unimpeachable
Word family adjectiveunimpeachableunimpeached
un·im·peach·a·ble /ˌʌnɪmˈpiːtʃəbəl◂/ adjectiveadj formal GOOD/EXCELLENTCERTAINLY/DEFINITELYso good or definite that criticism or doubt is impossible 无可指摘的,无懈可击的;不容置疑的;可靠的 unimpeachable morals 无可指摘的品行
—unimpeachably adverbadv