| 気 | き | spirit; mind; heart; nature | n4 |
| 人気 | にんき | popularity; public favor; condition (e.g. market); tone | n4 |
| 気持 | きもち | feeling; sensation; mood; state of mind | n4 |
| 病気 | びょうき | illness (usu. excluding minor ailments, e.g. common cold); disease; sickness; bad habit | n4 |
| 空気 | くうき | air; atmosphere; mood; situation | n4 |
| 気の毒 | きのどく | pitiful; unfortunate; poor; miserable | n3 |
| 気がつく | きがつく | to notice; to realize; to realise; to become aware (of) | n1 |
| 元気 | げんき | lively; full of spirit; energetic; vigorous | n5 |
| 気分 | きぶん | feeling; mood | n4 |
| 平気 | へいき | cool; calm; composed; unconcerned | n3 |
| 勇気 | ゆうき | courage; bravery; valour; valor | n2 |
| 気づく | きづく | to notice; to realize; to realise; to become aware (of) | n4 |
| 天気 | てんき | weather; fair weather; fine weather | n5 |
| 合気道 | あいきどう | aikido | |
| 気持ち | きもち | feeling; sensation; mood; state of mind | n4 |
| 気に入る | きにいる | to like; to be pleased with; to be delighted with; to take a liking to | n4 |
| 電気 | でんき | electricity; (electric) light | n5 |
| 気味 | きみ | sensation; feeling; tendency; propensity | n2 |
| 気候 | きこう | climate | n2 |
| 雰囲気 | ふんいき | atmosphere; mood; ambience; ambiance | n2 |
| 無邪気 | むじゃき | innocent; simple-minded | n1 |
| 本気 | ほんき | seriousness; earnestness; truth; sanctity | n2 |
| 陽気 | ようき | cheerful; jovial; merry; lively | n3 |
| 気配 | けはい | indication; sign; hint; sensation | n2 |
| 意気 | いき | spirit; heart; disposition | n1 |
| 陰気 | いんき | gloomy; dismal; miserable; melancholy | |
| 気付く | きづく | to notice; to realize; to realise; to become aware (of) | n4 |
| 何気ない | なにげない | casual; unconcerned; nonchalant; indifferent | n1 |
| 気質 | きしつ | disposition; temperament; nature; mentality | n1 |
| 気が付く | きがつく | to notice; to realize; to realise; to become aware (of) | n1 |
| 景気 | けいき | business conditions; the market; economic activity; economic climate | n2 |
| 気楽 | きらく | carefree; comfortable; at ease; easygoing | n2 |
| 不気味 | ぶきみ | weird; eerie; ominous; creepy | |
| 生意気 | なまいき | impertinent; saucy; cheeky; impudent | n1 |
| 意気地 | いくじ | self-respect; self-confidence; guts; backbone | n2 |
| 湯気 | ゆげ | steam; vapour; vapor | |
| 一気に | いっきに | in one go; in one gulp; in one breath; without stopping | n2 |
| 狂気 | きょうき | madness; insanity | n1 |
| 根気 | こんき | patience; perseverance; persistence; tenacity | n2 |
| 気取る | きどる | to be affected; to put on airs; to act like (something one isn't); to pretend to be | |
| 気象 | きしょう | weather (conditions); disposition; temperament | n2 |
| 気力 | きりょく | willpower; energy; vitality | n2 |
| 気色 | きしょく | mood; humor; humour; looks | |
| 呑気 | のんき | easy; easygoing; carefree; happy-go-lucky | |
| 気温 | きおん | (air) temperature | n3 |
| 正気 | しょうき | sanity; consciousness; soberness | |
| 気味悪い | きみわるい | unpleasant; uncomfortable; creepy; spooky | |
| お気に入り | おきにいり | favorite; favourite; pet (e.g. teacher's pet); bookmark (in a web browser) | n2 |
| 気軽に | きがるに | freely; readily; cheerfully; without any sense of hesitation | |
| 気味が悪い | きみがわるい | creepy (feeling); uneasy (feeling); bad (feeling); giving one the creeps | |
| 呆気 | あっけ | being taken aback; state of shock; dumbfoundedness | |
| 気違い | キチガイ | madness; insanity; madman; lunatic | |
| 無気味 | ぶきみ | weird; eerie; ominous; creepy | |
| 気性 | きしょう | disposition; temperament; temper; nature | n2 |
| 蒸気 | じょうき | steam; vapour; vapor; steamboat | n1 |
| 気軽 | きがる | carefree; buoyant; lighthearted; sprightly | n2 |
| 活気 | かっき | energy; vigour; vigor; liveliness | n2 |
| 大気 | たいき | atmosphere; air; magnanimity; generosity | n1 |
| 浮気 | うわき | extramarital sex; affair; fooling around; infidelity | |
| 寒気 | さむけ | chill; the shivers; shivering fit | |
| 生気 | せいき | life; vitality; verve; vigor | n1 |
| 気勢 | きせい | fervour; fervor; vigour; vigor | n2 |
| 臭気 | しゅうき | bad smell; stink | |
| 気風 | きふう | character; traits; ethos | |
| 気まぐれ | きまぐれ | whim; caprice; fancy; capricious | n1 |
| 暢気 | のんき | easy; easygoing; carefree; happy-go-lucky | |
| 気高い | けだかい | sublime; noble; high-minded | |
| 気絶 | きぜつ | faint; fainting; losing consciousness | |
| 血の気 | ちのけ | blood (in one's face, cheeks, etc.); colour; color; hot-bloodedness | |
| 気まま | きまま | willful; wilful; selfish; self-centered | n1 |
| 気がかり | きがかり | worry; anxiety; concern | n1 |
| 香気 | こうき | fragrance | |
| 色気 | いろけ | colouring; coloring; shade of colour (color); sex appeal (esp. of women) | n1 |
| 気づかう | きづかう | to worry about (someone's welfare or comfort); to feel anxious about; to have apprehensions of | n1 |
| 不景気 | ふけいき | economic slump; hard times; depression; recession | n1 |
| 気品 | きひん | elegance; refinement; grace; dignity | |
| 内気 | うちき | shy; bashful; timid; reserved | |
| 血気 | けっき | vigor; vigour; ardor; ardour | n1 |
| 上気 | じょうき | flushing (of one's cheeks); dizziness; rush of blood to the head | n1 |
| 湿気 | しっけ | moisture; humidity; dampness | n3 |
| 語気 | ごき | tone; manner of speaking | |
| やる気 | やるき | will (to do something); drive; motivation; enthusiasm | n2 |
| 気むずかしい | きむずかしい | hard to please; difficult; particular; fussy | |
| 気がする | きがする | to feel (as if); to have a feeling (that); to have a hunch (that); to get a sense (that) | |
| 気まずい | きまずい | unpleasant; awkward; embarrassing; uneasy | n1 |
| 殺気 | さっき | thirst for blood; bloodlust; determination to kill | n3 |
| 気焔 | きえん | high spirits; boastful talk | |
| 気遣う | きづかう | to worry about (someone's welfare or comfort); to feel anxious about; to have apprehensions of | n1 |
| 堅気 | かたぎ | honest; respectable; decent; respectable occupation (i.e. not yakuza, prostitute, etc.) | |
| 気狂い | キチガイ | madness; insanity; madman; lunatic | |
| 気合 | きあい | (fighting) spirit; motivation; effort; shout (for getting in the right mood to deal with something, etc.) | n1 |
| 水蒸気 | すいじょうき | water vapour; water vapor; steam | n1 |
| 意気込み | いきごみ | ardor; enthusiasm | n1 |
| 気魄 | きはく | spirit; soul; drive; vigor | n1 |
| 気遣い | きづかい | consideration; concern; fear; worry | |
| 気にいる | きにいる | to like; to be pleased with; to be delighted with; to take a liking to | n4 |
| 大人気 | だいにんき | very popular; highly favoured | |
| 短気 | たんき | short temper; quick temper; hot temper; impatience | n3 |
| 気取り | きどり | affectation; pretension; posturing; posing as | |
| 夜気 | やき | night air; stillness of night; cool evening | |