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経過

けいか (keika)
noun / suru-verb★Intermediate— passage of time
formal

The process of time passing or events unfolding; the way something develops or progresses over time.

手術後の経過は順調です。

The postoperative course has been smooth.

この事件の経過を詳しく説明してください。

Please explain the details of how this incident unfolded.

💡

Often used in medical, legal, or technical contexts to describe the progression of a process or situation.

formal

A period of time that has passed; elapsed time.

経過観察が必要です。

Observation over a period of time is necessary.

💡

Common in medical and technical contexts to describe a waiting period before making a decision.

Collocations

経過観察observation over time経過報告progress report経過措置interim measure経過時間elapsed time

Synonyms

推移進行経緯

Related Phrases

時間が経過するphrase
time passes
経過を見るphrase
to observe the progression

💡Pro Tip

Distinguish from 経緯 (けいい)

経過 refers to the progression or passage of time/events, while 経緯 refers to the circumstances or background leading up to a situation. For example, 事件の経過 (the progression of an incident) vs. 事件の経緯 (the circumstances of an incident).

⚡Gold Rule

Formal vs. Informal

経過 is a formal word. In casual speech, use phrases like 時間がたつ (time passes) or 状況が変わる (situation changes).

📖Word Origin

From the verb 経る (へる, heru, 'to pass through') + 過ぎる (すぎる, sugiru, 'to pass'). The compound expresses the idea of time or events passing sequentially.

📝Usage Notes

経過 is a formal term used in written language, particularly in medical, legal, and technical contexts. It is not commonly used in casual conversation. The verb form 経過する (けいかする, keika suru) means 'to pass' or 'to elapse'.

Word Breakdown

経
to pass through
root
+
過
to pass
root
和英辞典

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