unimpeachable
adjective formal approving uk/ˌʌn.ɪmˈpiː.tʃə.bəl/ us/ˌʌn.ɪmˈpiː.tʃə.bəl/
（品格）无可怀疑的，无可指责的，无可挑剔的
of such a high standard of honesty and moral goodness that it cannot be doubted or criticized
A spokesman said the Bishop was a man of unimpeachable integrity and character. 一位发言人说主教是一个正直无私、品格高尚的人。
Synonyms: blamelessirreproachable unexceptionable