unfailingadj.
英 ʌn'feɪlɪŋ | 美 ʌn'felɪŋ
中文adj. 经久不衰的；可靠的；无穷尽的
词根词源
unfailing (adj.)late 14c., "never coming to an end, unceasing, everlasting, inexhaustible," from un- (1) "not" + present participle of fail (v.). Related: Unfailingly.
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