不ふ誠せい意い

noun

insincerity; dishonesty; bad faith

Refers to a lack of sincerity or honesty in attitude or behavior. Often used in formal or written contexts to describe untrustworthy conduct.

• 彼かれの不ふ誠せい意いな態たい度どに失しつ望ぼうした。

  I was disappointed by his insincere attitude.

• 契けい約やくにおける不ふ誠せい意いは許ゆるされない。

  Bad faith in a contract is not tolerated.