unsparingadj.
英 ʌn'speərɪŋ | 美 ʌn'spɛrɪŋ
中文adj. 严厉的；不吝惜的；不宽恕的
词根词源
unsparing (adj.)"showing no mercy," 1580s, from un- (1) "not" + sparing, attested from late 14c. as a present participle adjective from spare (v.). Meaning "profuse" is from 1660s. Related: Unsparingly.
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