Translation guide
Expresses an abrupt shift in state, condition, or situation. Japanese often uses specific verbs, adverbs, or compound nouns depending on what changes and how dramatic the change is.
Describing a sudden, often unexpected change in circumstances, weather, mood, etc.
Noun/suru-verb meaning a sudden, drastic change, often used for weather, situations, or medical conditions.
Common adverbial phrase meaning 'to change suddenly'. Versatile and natural in casual speech.
His attitude suddenly changed.
Noun/suru-verb meaning a complete or sudden change, often implying a reversal or transformation.
The situation changed completely.
Noun/suru-verb for a drastic, violent change, often used in social or environmental contexts.
Society undergoes a drastic change.
Describing an abrupt turn, shift in policy, or change of plans.
Describing an abrupt shift in feelings, such as from calm to anger or happiness to sadness.
Describing an abrupt transformation in how something looks or its physical properties.
急変 is a formal noun/suru-verb often used in news or serious contexts (weather, health). 急に変わる is a more casual, everyday phrase suitable for personal situations.
The weather changed suddenly. (formal)
His mood suddenly changed. (casual)
The phrase 'sudden change' is often not translated word-for-word. Instead, use an adverb like 急に with a specific verb (変わる, 変える, なる) or a compound noun like 急変.
There was a sudden change in the weather.
His attitude suddenly changed.
Noun/suru-verb for a change of direction, often used metaphorically for policy or strategy shifts.
The government announced a sudden change in policy direction.
彼の態度が豹変した。
His attitude underwent a sudden transformation.
景色が一変した。
The scenery changed completely.