| 適切 | てきせつ | appropriate; suitable; fitting; apt | n2 |
| 適す | てきす | to fit; to suit | |
| 適当 | てきとう | suitable; proper; appropriate; adequate | n3 |
| 適用 | てきよう | application (of a rule, law, method, etc.) | n1 |
| 最適 | さいてき | most suitable; optimum; optimal; best | n2 |
| 快適 | かいてき | pleasant; agreeable; comfortable | n2 |
| 不適切 | ふてきせつ | unsuitable; inappropriate; improper | |
| 適度 | てきど | moderate (degree); proper (amount); temperate; suitable | n2 |
| 適応 | てきおう | adaptation; accommodation; conformity | n2 |
| 適 | たまたま | by chance; by accident; accidentally; happen to (be, do) | n2 |
| 適正 | てきせい | reasonable; suitable | n1 |
| 適合 | てきごう | conformity; compatibility; adaptability; congruity | n1 |
| 最適化 | さいてきか | optimization; optimisation | |
| 適性 | てきせい | aptitude; aptness; suitability | n2 |
| 適する | てきする | to fit; to suit | |
| 適う | あたう | to be able (to do); to be capable (of doing) | |
| 適宜 | てきぎ | suitable; appropriate; fitting; proper | |
| 適職 | てきしょく | suitable occupation | |
| 適任 | てきにん | competent; suitable; qualified | n1 |
| 適量 | てきりょう | proper quantity; suitable amount; proper dose; optimal dose | n1 |
| 適否 | てきひ | propriety; fitness; aptitude | |
| 適格 | てきかく | eligible; qualified; competent | n2 |
| 適中 | てきちゅう | hitting the target; striking home; proving to be right; coming true | |
| 適法 | てきほう | legal; lawful; legitimate | |
| 好適 | こうてき | ideal; fit; fitted; fitting | n1 |
| 適例 | てきれい | exemplification; good example; case in point | |
| 快適さ | かいてきさ | comfort; ease; amenity | |
| 不適 | ふてき | inadequacy; inappropriateness; unfitness; impropriety | n1 |
| 適性検査 | てきせいけんさ | aptitude test | |
| 適温 | てきおん | suitable temperature; right temperature; moderate temperature | |
| 自適 | じてき | living free from worldly care; easy and comfortable living | |
| 適応障害 | てきおうしょうがい | adjustment disorder; maladjustment | |
| 適齢 | てきれい | suitable age | |
| 適材適所 | てきざいてきしょ | the right person in the right place | |
| 不適合 | ふてきごう | non-conforming process; noncompliant; incompatible | |
| 適材 | てきざい | man fit for the post; right person | |
| 適用外 | てきようがい | not applicable; not subject to (a law, rule, etc.); outside the scope (of); exempt (from) | |
| 適地 | てきち | suitable place | |
| 悠々自適 | ゆうゆうじてき | living a life of leisure with dignity; living quietly and comfortably free from worldly cares; otium cum dignitate | |
| 適時 | てきじ | timely; opportune | |
| 適期 | てっき | proper time (e.g. for harvesting rice); appropriate time; right time | |
| 不適当 | ふてきとう | inadequacy; inappropriateness; unfitness; impropriety | |
| 最適解 | さいてきかい | optimal solution | |
| 適合性 | てきごうせい | compatibility; conformance; fitness; adaptability | |
| 適応力 | てきおうりょく | adaptability; capacity to adapt; ability to adjust | |
| 適所 | てきしょ | right place; right position; right post | |
| 適役 | てきやく | being suited to a role; being the right person for the job; suitable role; suitable position | |
| 適評 | てきひょう | apt criticism | |
| 適える | かなえる | to fulfill (a condition); to meet (a requirement) | n2 |
| 適者 | てきしゃ | suitable person; fit person; the fit | |
| 適任者 | てきにんしゃ | suitable person; well-qualified person; responsible party; responsible person | |
| 適者生存 | てきしゃせいぞん | survival of the fittest | |
| 不適任 | ふてきにん | unfitness; incompetency | |
| 適用範囲 | てきようはんい | range of use; range of application; range of applications; scope (of a document) | |
| 適格性 | てっかくせい | eligibility | |
| 適応能力 | てきおうのうりょく | adaptability; ability to adapt; flexibility | |
| 適応度 | てきおうど | fitness | |
| 適用除外 | てきようじょがい | exemption (e.g. from application of a law); exclusion | |
| 適応性 | てきおうせい | adaptability; flexibility; malleability | |
| 適応症 | てきおうしょう | diseases for which a particular medicine is indicated | |
| 適齢期 | てきれいき | suitable age (esp. for marriage); marriageable age | |
| 不適正 | ふてきせい | improper; inappropriate; illegitimate; unacceptable | |
| 適法性 | てきほうせい | legality; lawfulness; legitimacy | |
| 適薬 | てきやく | specific medicine or remedy | |
| 不適用 | ふてきよう | not applicable; N/A | |
| 適時打 | てきじだ | clutch hit; run-scoring hit; RBI hit | |
| 婚姻適齢 | こんいんてきれい | legal age of marriage | |
| 適正価格 | てきせいかかく | fair or reasonable price | |
| 清適 | せいてき | (another's) well-being | n2 |
| 社会適応 | しゃかいてきおう | social adjustment | |
| 進適 | しんてき | academic aptitude test (taken by Japanese university applicants between 1948 and 1954) | |
| 不適格 | ふてきかく | disqualification; unfitness; noncompliance | |
| 適不適 | てきふてき | suitability | |
| 非適用 | ひてきよう | not applicable; N/A | |
| 過剰適応 | かじょうてきおう | overfitting | |
| 結婚適齢期 | けっこんてきれいき | marriageable age | |
| 適作 | てきさく | suitable crop | |
| 適訳 | てきやく | proper or suitable translation; exact rendering | |
| 原告適格 | げんこくてきかく | standing (of a legal case, e.g. whether there are grounds to prosecute) | |
| 適用業務 | てきようぎょうむ | application | |
| 血液型不適合 | けつえきがたふてきごう | blood type incompatibility | |
| 適確 | てきかく | accurate; precise; exact; appropriate | n2 |
| 適用分野 | てきようぶんや | field of application | |
| 適合性試験 | てきごうせいしけん | conformance testing | |
| 適に | たまに | occasionally; once in a while; now and then | n5 |
| 適業 | てきぎょう | suitable occupation | |
| 外適応 | がいてきおう | exaptation | |
| 適格者 | てきかくしゃ | qualified or eligible person | |
| 過剰適合 | かじょうてきごう | overfitting; overfitting (in machine learning) | |
| 適応放散 | てきおうほうさん | adaptive radiation | |
| 社会的適応 | しゃかいてきてきおう | social adaptation | |
| 社会不適応者 | しゃかいふてきおうしゃ | person unfit for society; misfit | |
| 素適 | すてき | lovely; wonderful; charming; enchanting | n3 |
| 至適 | してき | optimal; optimum | n2 |
| 適わない | かなわない | no match for; cannot compete with; not in the same league as; powerless against | n2 |
| 技適 | ぎてき | technical standards compliance | |
| 適湿 | てきしつ | moderate humidity | |
| 適潤 | てきじゅん | suitably damp; adequately wet (e.g. for plants) | |
| 適語 | てきご | appropriate word; apt word or expression; mot juste | |
| 過適合 | かてきごう | overfitting (in machine learning) | |
| 適した | てきした | adequate (for); suitable (to, for); appropriate (for); proper | |
| 適わぬ | かなわぬ | impossible (dream, wish, etc.); unfulfillable; unrequited (love); hopeless | |
| 適合率 | てきごうりつ | precision; precision ratio; relevance factor; relevance ratio | |
| 適用性 | てきようせい | applicability | |
| 風適法 | ふうてきほう | Law Controlling Business Affecting Public Morals; Adult Entertainment Law; Amusement Businesses Law; Entertainment Businesses Law | |
| 一括適用 | いっかつてきよう | batch application | |
| 不適任者 | ふてきにんしゃ | unqualified (incompetent) person; square peg in a round hole | |
| 不適格者 | ふてきかくしゃ | unqualified person; ineligible person; unsuitable person; incompetent person | |
| 優游自適 | ゆうゆうじてき | living a life of leisure with dignity; living quietly and comfortably free from worldly cares; otium cum dignitate | |
| 優遊自適 | ゆうゆうじてき | living a life of leisure with dignity; living quietly and comfortably free from worldly cares; otium cum dignitate | |
| 凸最適化 | とつさいてきか | convex optimization | |
| 初度適用 | しょどてきよう | first-time adoption; initial application (e.g. of a new technology) | |
| 域外適用 | いきがいてきよう | extraterritorial application (e.g. of a law); extraterritoriality | |
| 形状適合 | けいじょうてきごう | conformable | |
| 心に適う | こころにかなう | to be pleased with; to be to one's liking | |
| 悠悠自適 | ゆうゆうじてき | living a life of leisure with dignity; living quietly and comfortably free from worldly cares; otium cum dignitate | |
| 意に適う | いにかなう | to satisfy (one); to meet (one's) desire | |
| 最適任者 | さいてきにんしゃ | best qualified person; most suitable person | |
| 最適課税 | さいてきかぜい | optimal taxation; optimum taxation | |
| 理に適う | りにかなう | to make sense | |
| 適さない | てきさない | unsuited; unfit; ill-fitted | |
| 適わぬ夢 | かなわぬゆめ | impossible dream | |
| 適合検査 | てきごうけんさ | conformance | |
| 適合規格 | てきごうきかく | compatible specification; compatible standards; conformity standards | |
| 適地適作 | てきちてきさく | right crop for the land; suitable crop for the land | |
| 適応機制 | てきおうきせい | adjustment mechanism | |
| 適応訓練 | てきおうくんれん | adaptive training | |
| 適正利潤 | てきせいりじゅん | reasonable profit | |
| 適正技術 | てきせいぎじゅつ | appropriate technology | |
| 適法手続 | てきほうてつづき | due process | |
| 適法行為 | てきほうこうい | legal (lawful) act | |
| 一般適合性 | いっぱんてきごうせい | general conformance | |
| 依存適合性 | いぞんてきごうせい | dependent conformance | |
| 動的適合性 | どうてきてきごうせい | dynamic conformance | |
| 最適ルート | さいてきルート | optimal route | |
| 最適発注量 | さいてきはっちゅうりょう | optimal order quantity; optimum purchasing lot size | |
| 望みが適う | のぞみがかなう | to have one's wish realized; to have one's wish realised | |
| 期待に適う | きたいにかなう | to live up to (one's) expectations | |
| 目的に適う | もくてきにかなう | to serve one's aim; to serve one's purpose | |
| 眼鏡に適う | めがねにかなう | to win the favour of (favor); to be acknowledged (e.g. by a superior); to measure up to | |
| 組織適合性 | そしきてきごうせい | histocompatibility | |
| 要求に適う | ようきゅうにかなう | to meet (one's) demands | |
| 道理に適う | どうりにかなう | to stand to reason | |
| 適合性ログ | てきごうせいログ | conformance log | |
| 適合性文書 | てきごうせいぶんしょ | conformance document | |
| 適応制御系 | てきおうせいぎょけい | adaptive control system | |
| 適応的期待 | てきおうてききたい | adaptive expectations | |
| 適応障がい | てきおうしょうがい | adjustment disorder; maladjustment | |
| 適格である | てきかくである | eligible | |
| 静的適合性 | せいてきてきごうせい | static conformance | |
| パレート最適 | パレートさいてき | Pareto optimum | |
| 単適合決定表 | たんてきごうけっていひょう | single-hit decision table | |
| 性別適合手術 | せいべつてきごうしゅじゅつ | sex reassignment surgery; sex change surgery; SRS; gender-affirming surgery | |
| 技術基準適合 | ぎじゅつきじゅんてきごう | technical standards compliance | |
| 汎適応症候群 | はんてきおうしょうこうぐん | general adaptation syndrome | |
| 社会不適合者 | しゃかいふてきごうしゃ | person unfit for society; misfit | |
| 組織不適合性 | そしきふてきごうせい | histoincompatibility | |
| 組織適合抗原 | そしきてきごうこうげん | histocompatibility antigen | |
| 進学適性検査 | しんがくてきせいけんさ | academic aptitude test (taken by Japanese university applicants between 1948 and 1954) | |
| 適合する実装 | てきごうするじっそう | conforming implementation | |
| 適合検査試験 | てきごうけんさしけん | conformance test | |
| 適正表示状態 | てきせいひょうじじょうたい | visually correct | |
| 適用業務問題 | てきようぎょうむもんだい | application problem | |
| 風営適正化法 | ふうえいてきせいかほう | Act on Control and Improvement of Amusement Business, etc. | |
| 児頭骨盤不適合 | じとうこつばんふてきごう | cephalopelvic disproportion; CPD | |
| 動的適合性要件 | どうてきてきごうせいようけん | dynamic conformance requirements | |
| 司法判断適合性 | しほうはんだんてきごうせい | justiciability | |
| 多重適合決定表 | たじゅうてきごうけっていひょう | multiple-hit decision table | |
| 悠々自適の生活 | ゆうゆうじてきのせいかつ | life free from worldly cares | |
| 悠悠自適の生活 | ゆうゆうじてきのせいかつ | life free from worldly cares | |
| 持分法適用会社 | もちぶんほうてきようかいしゃ | affiliated company accounted for by the equity-method | |
| 条件付き最適化 | じょうけんつきさいてきか | constrained optimization | |
| 無限定適正意見 | むげんていてきせいいけん | unqualified opinion | |
| 適合性解決試験 | てきごうせいかいけつしけん | conformance resolution tests | |
| 適合性評価過程 | てきごうせいひょうかかてい | conformance assessment process | |
| 適応デルタ変調 | てきおうデルタへんちょう | Adaptive Delta Modulation | |
| 適応変換符号化 | てきおうへんかんふごうか | Adaptive Transform Coding; ATC | |
| 静的適合性審査 | せいてきてきごうせいしんさ | static conformance review | |
| 静的適合性要件 | せいてきてきごうせいようけん | static conformance requirements | |
| コンパイラ最適化 | コンパイラさいてきか | compiler optimization | |
| 既存不適格建築物 | きぞんふてきかくけんちくぶつ | existing nonconforming building; building that no longer conforms to current laws or regulations (because of changes in said laws or regulations) | |
| 最適化プログラム | さいてきかプログラム | optimization program; optimisation program | |
| 適合SGML応用 | てきごうエスジーエムエルおうよう | conforming SGML application | |
| 適合SGML文書 | てきごうエスジーエムエルぶんしょ | conforming SGML document | |
| 限度額適用認定証 | げんどがくてきようにんていしょう | Eligibility Certificate for Ceiling-Amount Application | |
| システム適合性宣言 | システムてきごうせいせんげん | system conformance statement | |
| 検索エンジン最適化 | けんさくエンジンさいてきか | search engine optimization; SEO | |
| 適用業務プログラム | てきようぎょうむプログラム | application software | |
| サーチエンジン最適化 | サーチエンジンさいてきか | search engine optimization; SEO | |
| 適格請求書等保存方式 | てきかくせいきゅうしょなどほぞんほうしき | qualified invoice retention system; qualified invoice storage method | |
| 適用業務ソフトウェア | てきようぎょうむソフトウェア | application software | |
| コンパイラの最適化能力 | コンパイラのさいてきかのうりょく | compiler efficiency | |
| 法の適用に関する通則法 | ほうのてきようにかんするつうそくほう | Act on General Rules for Application of Laws | |
| システム適合性試験報告書 | システムてきごうせいしけんほうこくしょ | system conformance test report; SCTR | |
| プロトコル実装適合性宣言 | プロトコルじっそうてきごうせいせんげん | protocol implementation conformance statement; PICS | |
| 主要組織適合遺伝子複合体 | しゅようそしきてきごういでんしふくごうたい | major histocompatibility complex; MHC | |
| 適応的差分パルス符号変調 | てきおうてきさぶんパルスふごうへんちょう | adaptive differential pulse-code modulation; adaptive DPCM; ADPCM | |
| プロトコル適合性試験報告書 | プロトコルてきごうせいしけんほうこくしょ | protocol conformance test report; PCTR | |
| 適用業務ソフトウェアプログラム | てきようぎょうむソフトウェアプログラム | application software program | |