前ぜん後ご矛む盾じゅん

Meanings

1

noun, noun or participle which takes 'suru'

yojijukugo (four-character idiom)

Refers to statements or actions that contradict each other, often used in formal or critical contexts. As a yojijukugo, it is a fixed four-character compound.

彼かれの説せつ明めいは前ぜん後ご矛む盾じゅんしている。
His explanation is self-contradictory.

前ぜん後ご矛む盾じゅんした発はつ言げんは信しん用ようを失うしなう。

Inconsistent remarks lose credibility.