Taciturn; of few words — a four-character idiom describing someone who is quiet and speaks little.
彼は沈黙寡言で、会議でもあまり発言しない。
He is taciturn and rarely speaks up even in meetings.
沈黙寡言な人は誤解されやすいことがある。
Taciturn people can sometimes be easily misunderstood.