1.
to jump to conclusions; to assume; to arbitrarily decide
To decide or declare something to be the case without sufficient evidence or consideration. Carries a negative nuance of unfair or hasty judgment.
勝手に決めつけないでほしい。
I'd like you not to jump to conclusions.
犯人だと決めつけるのは早い。
It's too early to assume they're the culprit.
見た目だけで人を判断して決めつけるのは良くない。
It's not right to judge people by their appearance and make assumptions about them.
USAGE:
決めつける always carries a negative connotation — it implies the judgment is unfair, premature, or unwarranted. The person doing the 決めつけ is seen as being unreasonable. Common patterns include ～と決めつける (to decide that...) and ～だと決めつける (to assume it's...).
PATTERNS:
- ～と決めつける: to assume that ~
- ～だと決めつける: to conclude that it is ~
- 頭から決めつける: to assume from the start
- 勝手に決めつける: to decide on one's own (without asking)