| 单词 | ad-lib | 
| 释义 | Word Frequency ad-lib(ædˈlɪb) verbWord forms: -libs, -libbing or -libbed 1.  to improvise and deliver without preparation (a speech, musical performance, etc) adjective (ad lib when predicative) 2.  improvised; impromptu  adverb ad lib 3.  without restraint; freely 4.  music  short for ad libitum  noun 5.  an improvised performance, often humorous  Derived forms ad-libber (ad-ˈlibber) noun Word origin C18: short for Latin ad libitum, literally: according to pleasure | 
	
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