勝かっ手てに

adverb

selfishly; without permission; on one's own accord

Describes acting on one's own judgment or desire, often disregarding others' wishes or rules. Can be neutral ('voluntarily') or negative ('selfishly').

• 彼かれは勝かっ手てに私わたしの部屋へやに入はいった。

  He entered my room without asking.

• ドアが勝かっ手てに開ひらいた。

  The door opened by itself.