Translation guide
How to express doing something completely, thoroughly, or to the end in Japanese. The best choice depends on whether you mean finishing a task, doing it exhaustively, or doing it with full effort.
To complete an action or process, often with a sense of finality.
Attach to the て-form of a verb to indicate completing an action, often with a nuance of finality or regret. Very common in spoken Japanese.
I did all my homework completely.
Let's finish reading this book.
To accomplish or carry something through to the end, emphasizing effort and achievement.
He completely did the difficult task.
Formal term for completing a task or process, often used in business or technical contexts.
We have completed the project.
To finish doing something, often used for tasks or activities. More formal than 終わる.
I'll contact you when I've finished the work.
To perform an action in a comprehensive, detailed, or exhaustive manner.
Adverb meaning 'thoroughly' or 'exhaustively'. Used with verbs to indicate doing something completely without leaving anything out.
We investigated the problem completely.
I cleaned the room thoroughly.
Adverb meaning 'completely' or 'entirely', often used for changes of state or when something is done fully.
Adverb meaning 'completely' or 'perfectly', emphasizing that nothing is missing or flawed.
To put all one's energy into an action, doing it wholeheartedly.
While 完全にやる is grammatically possible, it often sounds unnatural. Use more specific expressions like 徹底的にやる or やり遂げる depending on the nuance.
I did my homework completely. (unnatural)
I did all my homework.
すっかり忘れていた。
I completely forgot.
The preparations are completely ready.
The plan failed completely.
Literally 'without leaving anything remaining', meaning exhaustively or thoroughly. Formal and literary.
He explained the theme completely, leaving nothing out.
I played to my heart's content.