| 单词 | vain | 
| 释义 | vainvain /veɪn/ ●●○ adjective 1disapproving someone who is vain is too proud of his or her good looks, abilities, or position:  He is very vain about his looks.► see thesaurus at proud2in vain a)without success in spite of your efforts:  They tried in vain to stop the mudslide. b)without purpose or without positive results:  He did not die in vain.3a vain attempt/hope/effort etc. an attempt, hope, etc. that fails to achieve the result you wanted:  She made a vain attempt to clean the room. [Origin: 1300–1400 Old French, Latin vanus empty, vain]—vainly adverb:  He tried vainly to explain his actions. → see also take the name of the Lord in vain at name1 (13), vanity  | 
	
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