しまいます（しまいます、shimaiまsu）
- to put away

The Japanese verb しまいます, written in hiragana as しまいます, expresses a sense of completion, regret, or the consequence of an action. It often indicates that something has been done completely, or that something has happened, sometimes with a negative outcome or a feeling of "oops" or "unfortunately". It can also express the idea of putting something away or finishing something. The core meaning revolves around the idea of something being "finished," "done," "over with," or "ended." The nuance depends on the context and the verb it's attached to.しまいますis a conjugation of the verb しまう.

⚫︎宿題をやってしまいました。 Translation: I finished doing my homework. / I ended up doing my homework. ⚫︎ケーキを全部食べてしまいました。 Translation: I ate all the cake. / I ended up eating all the cake. ⚫︎傘を電車に置き忘れてしまいました。 Translation: I accidentally left my umbrella on the train. / I ended up leaving my umbrella on the train.

⚫︎しまいます is added to the *te-form* of a verb (the -て form) or the *ta-form* (the -た form) for past tense usage to express completion, or regret. ⚫︎When used with the *te-form*, it often implies that an action has been completed, often with a sense of "by accident," "unfortunately," or "I ended up doing...". ⚫︎When used with the *ta-form*, it highlights the completion of the action, often with a feeling of regret or disappointment. ⚫︎It can also be used in more neutral ways to express that something has been put away or stored. ⚫︎ The casual form is ちゃう or じゃう, which are used in conversation.

⚫︎The base form of the verb is しまう. ⚫︎It is typically written in hiragana as しまいます, しまう, ちゃう, or じゃう. ⚫︎The kanji form 仕舞います exists, but it's less common and mainly used for the meaning of "to put away" or "to finish". ⚫︎Variations in the okurigana (suffix hiragana) are present depending on the conjugation. For example, しまって, しまった, しまう, しまえ.

⚫︎終える (おえる): to finish, to complete ⚫︎済ませる (すませる): to finish, to get done with ⚫︎完了する (かんりょうする): to complete, to finish (formal) ⚫︎Depending on the nuance: …てしまった, …てしまう, …てしまう are very similar to しまいます and can often be used interchangeably.

⚫︎There isn't a direct antonym for しまいます because its meaning is nuanced depending on the verb it modifies. However, considering the various nuances: ⚫︎ For "completion": The opposite could be "to not start," "to not finish," or "to leave undone". ⚫︎ For "regret": there isn't one. The absence of regret doesn't really have a direct equivalent in this context.

テストの勉強を全部してしまいました。 ・Translation: I finished studying for the test completely. / I ended up studying for the test. ・Explanation: This sentence indicates the completion of studying for the test. It might also imply that the speaker studied intensely or possibly felt a slight regret.

大事な書類をなくしてしまいました。 ・Translation: I lost the important document. / I ended up losing the important document. ・Explanation: This sentence conveys a sense of regret or misfortune about losing an important document.

The verb しまう originally meant "to put away" or "to store." Over time, it developed the broader meaning of completing an action and thus acquired the sense of "finishing," "ending," and "regret." The etymology of the kanji 仕舞 comes from the characters 仕 (shi) which refers to to do and 舞 (mai) dance or put away. This meaning evolved to encompass the feeling of something being finished or ended.