be scanty of words;not to be given to much speech;sparing in speech;uncommunicative;taciturnity ;

For once, she lost / dropped her customary reserve and became quite lively.
这次, 她一反平素的沉默寡言,表现得很活跃.
来源:词典精选例句But these men were a taciturn lot , picking their words carefully.
但是这些人都是沉默寡言的人, 说起话来字斟句酌,非常谨慎.
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