おしまい・お仕舞い・お終いoshimai

1. nounthe end; closing; being done for
   今日きょうはこれでおしまいにしてはどうでしょう。↗

   What do you say to calling it a day?
2. interjectionthat's it; that's enough; that's all

• Synonym終わりおわりNeutralThe most common word for an end or finish, also the end of life; 「もう終わりだ」 can likewise mean someone is done for, but 「おしまい」 is the more colloquial choice.
• Synonym最後さいごNeutralStresses being the very last in a sequence, as in 「最後の一人」; 「…したら最後」 means 'once you do that, it's all over'.
• SynonymエンドNeutralA loanword for the ending; rarely used alone, mostly in compounds like 「エンドロール」 and 「ハッピーエンド」.
• Synonym終結しゅうけつWrittenA written word for wars or events being brought to a close, as 「戦争の終結」; not for the end of everyday little things.
• Synonym終幕しゅうまくWrittenOriginally the last act of a play, by extension the close of an affair, as 「終幕を迎える」; written word.
• Synonym結末けつまつNeutralFocuses on how an event or story turns out in the end, as 「意外な結末」; unlike 「おしまい」 it does not declare 'that's it, we stop here'.
• Synonym終局しゅうきょくWrittenThe settling or final end of a matter; also the end of a go or shogi game. Written word.
• SynonymフィニッシュNeutralA loanword for the finishing move or the final moments of a contest, e.g. a gymnastics landing; stresses the moment of completion.
• SynonymエンディングNeutralA loanword for the closing part of a work—the ending of a film, game or anime, or its closing theme song.
• Synonym終了しゅうりょうFormalFormal word for something being fully over, as 「受付終了」 and 「試合終了」; can also hyperbolically mean things are utterly ruined.
• Synonym幕切れまくぎれWrittenOriginally the fall of the curtain at the end of an act, by extension how an affair ends, as 「あっけない幕切れ」; written word.
• SynonymラストCasualA colloquial loanword for last or the ending, as in 「ラストチャンス」 and 「ラストシーン」.
• Synonym閉幕へいまくFormalFormal word for a performance or event closing, as 「大会が閉幕する」.
• Synonym終焉しゅうえんWrittenThe end of a life or one's dying moments, or the demise of an era, as 「時代の終焉」; solemn, written word.
• Synonym完了かんりょうNeutralFor procedures or tasks being fully completed, as 「登録完了」; stresses getting it all done. Also the perfect tense in grammar.
• Synonym完結かんけつNeutralFor a whole run of things—a serial or series—coming to a full close, as 「シリーズ完結」.
• SynonymむすびNeutralThe closing part of a piece of writing or a speech, as 「結びの言葉」; also tying a knot or joining things.
• Synonym末すえNeutralThe tail end of a period, as 「今月の末」 and 「年の末」; 「…の末に」 means 'after a long process'; also the youngest child.
• Synonym仕舞いしまいNeutralMeans an end, often as 「仕舞いには」 'in the end, to one's surprise'; also a Noh dance in plain clothes. In speech the 「お」-prefixed form is more common.
• Synonym完かんWrittenMarked at the end of a work to mean 'The End'; also a suffix for completion. Not used to say something is over in conversation.
• Synonym終止しゅうしWrittenA written word for stopping or ceasing, also the end of a paragraph; in speech say 「おしまい」 or 「終わり」 instead.
• Synonym締めくくりしめくくりNeutralStresses wrapping things up well, as 「一年の締めくくり」; 「おしまい」 merely announces that something is over.
• Related最終さいしゅうNeutralMeans last or final, mostly modifying nouns as in 「最終回」 and 「最終電車」; alone it can mean the last train of the day.
• Related終点しゅうてんNeutralStresses place: the last stop of a line, as 「バスの終点」; also the endpoint of a vector.
• Related末期まっきWrittenA written word for the final stage of a period, as 「江戸末期」 or 「末期がん」; names the phase but does not declare an end.

For everyday 'end' use 「終わり」, and 「終了」 in formal notices; 「おしまい」 is the colloquial way to call it a day, stop there, or say all is lost, as in 「今日はおしまい」「もうおしまいだ」. 「終わり」 can also mean done for, but 「おしまい」 is more casual. For the outcome of a story use 「結末」, for the last in a sequence 「最後」 or colloquial 「ラスト」, for completed tasks 「完了」, for a series wrapping up 「完結」, for the last stop 「終点」, for periods 「末」 or 「末期」, for the death of an era 「終焉」, and for closings on stage 「終幕」「幕切れ」「閉幕」.

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

1. おわり。
2. 絶望的ぜつぼうてきな状況じょうきょう。
3. 和文わぶん通話つうわ表ひょうで「ん」を表あらわす。