勝手に
N2かってに
[kateni]
Definitions
1.adverb (fukushi)
arbitrarily; of its own accord; without asking; voluntarily; willfully; as one pleases; selfishly; by itself; automatically
Example Sentences
彼は勝手に私の部屋に入ってきたので怒った。
I got angry because he entered my room without permission.
勝手に人の物を使うのはマナー違反だ。
Using other people's things without permission is bad manners.
子供が勝手に家を出て心配になった。
I got worried because the child left the house on their own.