monosyllable

柯林斯词典

1. N-COUNT If you say that someone speaks in monosyllables, you mean that they speak very little or they only use words consisting of one syllable, such as "yes," "no," or "I don't know," usually because they do not want to have a conversation. 少言寡語[usu 'in' N in pl]
A taciturn man, he replied to my questions in monosyllables. 他不愛說話，對我的問題都衹用一兩個字來廻答。