勝手に

What it means

What does 勝手に mean? It denotes doing something without permission or outside someone’s authority, often implying you act on your own initiative or according to your own will, typically with a negative or boundary-crossing nuance.

Main meanings

• Without permission or consent; acting unilaterally
• Arbitrarily or as one pleases; taking action on one's own initiative
• A admonishing tone when someone acts selfishly or intrudes on others’ rights
• Used in the construction 勝手に〜する to describe unilateral actions

How to use it

Used in casual speech to describe actions taken without asking or consent, often conveying disapproval; commonly forms the pattern 勝手に〜する to indicate unilateral action; frequently used in direct admonitions and complaints.