taciturn

在聚会上，他安静地坐在角落里，显得很沉默寡言。

At the party, he sat quietly in the corner, appearing very ___taciturn.

那位年迈的灯塔看守人沉默寡言到访客以为他是哑巴。

The elderly lighthouse keeper was so ___taciturn that visitors thought he was mute.

那位沉默寡言的修理工对每个问题都只回一声咕哝或一个耸肩。

The ___taciturn mechanic answered every question with a single grunt or a shrug.