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sans faille meaning in English

FrenchEnglish
sans faille nom

ironclad◼◼◼(solid or certain)
noun
[UK: ˈaɪən.klæd] [US: ˈaɪərn.ˌklæd]

sans faille [figuratively] adjectif

unwavering◼◼◼(always on course and steady)
adjective
[UK: ʌn.ˈweɪ.vər.ɪŋ] [US: ʌˈn.weɪ.vər.ɪŋ]