気きを許ゆるす

expression, godan verb (-su)

let one's guard down; drop one's guard; be off one's guard

Used when someone relaxes their vigilance or caution, often in a social or emotional context, making themselves vulnerable.

• 彼かれは親しん友ゆうにだけは気きを許ゆるしている。

  He lets his guard down only with his close friends.

• 知しらない人ひとに気きを許ゆるしてはいけない。

  You mustn't let your guard down with strangers.