いいii

1. i-adjective (よい/いい)good; excellent; fine; nice; pleasant; agreeablealso written 良い, 好い and 善い
   又また来年らいねん会あえるといいですね。↗

   Hope to see you again next year.
2. i-adjective (よい/いい)sufficient; enough; ready; prepared
   「今日きょうお父とうさんに会あいに行いく。進路しんろ相談そうだんだ」「いいですよ、そんなの」↗

   "I'm going to see your father today, about career counselling." "You don't need to bother with that."
3. i-adjective (よい/いい)profitable (deal, business offer, etc.); beneficial
   ある日ひ、友人ゆうじんから「いい話はなしがあるから会あわないか」と電話でんわがあり、友人ゆうじんの家いえへ出でかけました。↗

   One day I had a phone call from a friend. "There's a nice little earner, won't you come round?" so I went to his house.
4. i-adjective (よい/いい)OK; all right; fine; no problemas て(も)いい, と(も)いい, etc.; indicates permission or compromise
   ５時じまでにもどるなら行いってもいいよ。↗

   You may go on condition that you return by five.

• Synonym良いよいNeutralNeutral. The form whose stem supplies every conjugation of 「いい」, as in 「よかった」「よくない」. On its own, 「よい」 sounds slightly more formal than 「いい」.
• SynonymよろしいFormalA polite, formal way of saying 「よい」, often when asking permission, as in 「よろしいですか」. Said alone, 「よろしい」 can carry a talking-down tone.
• SynonymうまいCasualColloquial word for skillful or tasty, as in 「歌がうまい」「うまい料理」. Covers a narrower range than 「いい」.
• Synonym素敵すてきNeutralLovely or charming in a way that appeals to you personally, as in 「素敵な人」; mostly praises looks and atmosphere.
• Synonym好ましいこのましいWrittenWritten-style word for desirable or satisfactory, as in 「好ましくない結果」; used for formal evaluation.
• Synonym心地よいここちよいNeutralPleasant in a soothing, comfortable way, as in 「心地よい風」「心地よい音楽」; focuses on the pleasant feeling something gives, more so than 「いい」.
• Synonym立派りっぱNeutralSplendid in a dignified, respectable way, as in 「立派な大人」; stresses that something is worthy of admiration.
• Synonym快いこころよいWrittenWritten-style word for feeling pleasant; also used in 「快く引き受ける」, agreeing to something readily.
• SynonymグッドCasualColloquial loanword meaning good; mostly spoken praise or part of compounds.
• Synonym素晴らしいすばらしいNeutralWonderful or amazing; expresses stronger admiration than 「いい」.
• SynonymナイスCasualColloquial loanword used mostly before a noun to praise something, as in 「ナイスプレー」「ナイスアイデア」.
• Synonym見事みごとNeutralSplendid or masterly, for skills or scenery alike, as in 「見事な演技」「見事な桜」.
• Synonym快適かいてきNeutralComfortable and pleasant, said of surroundings or daily life, as in 「快適な暮らし」.
• Synonym上々じょうじょうNeutralSaid of results turning out very well, as in 「出来は上々だ」; carries a satisfied tone.
• Synonym気持ちいいきもちいいCasualColloquial word for feeling good physically or emotionally, as in 「お風呂は気持ちいい」; focuses on the sensation.
• SynonymかっこいいCasualColloquial, youthful word for looking or acting cool, as in 「かっこいい車」.
• Synonym結構けっこうFormalFormal word meaning quite good, or a polite refusal as in 「もう結構です」; more courteous than 「いい」.
• Synonym良好りょうこうWrittenWritten-style word for a good state or results, common in reports, as in 「経過良好」.
• Synonym好こうWrittenWritten-style prefix, as in 「好成績」「好条件」; rarely used on its own.
• Synonym優れたすぐれたWrittenWritten-style word for outstanding, superior to others, as in 「優れた才能」; mostly used before a noun.
• RelatedきれいNeutralMeans pretty or clean and tidy, as in 「きれいな部屋」; focuses on appearance.
• Related麗しいうるわしいWrittenWritten and slightly old-fashioned; beautiful and moving, or warm in feeling, as in 「麗しい友情」.
• Antonym悪いわるいNeutralThe direct opposite of 「いい」: bad. Also used to apologize lightly, as in 「悪いね」.
• AntonymひどいCasualColloquial antonym meaning terrible, cruel or awful; stronger than 「悪い」.

Default to 「いい」 for good, using 「よい」 in conjugations. For formal situations pick 「よろしい」, for skill or taste 「うまい」, for comfort 「快適」 or 「気持ちいい」, for something amazing 「素晴らしい」, and for bad use 「悪い」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 質しつが高たかく、望のぞましい状態じょうたいだ。
2. 必要ひつような条件じょうけんを満みたしていて、不足ふそくがない。
3. 金銭きんせんや労力ろうりょくに対たいして得えるものが大おおきい。
4. 承諾しょうだくや許可きょかを与あたえる返事へんじだ。