他た人にん行ぎょう儀ぎ

na-adjective, noun

standing on ceremony; overly formal; distant

Describes behavior that is excessively polite or reserved, as if treating a close friend or family member like a stranger. Often used in negative contexts to criticize unnecessary formality.

• 親しん友ゆうなのに、そんな他た人にん行ぎょう儀ぎな話はなし方かたはやめてよ。

  We're close friends, so stop talking to me like a stranger.

• 彼かれはいつも他た人にん行ぎょう儀ぎで、なかなか心こころを開ひらかない。

  He's always so formal and distant; he rarely opens up.