laconic

1. ADJ If you describe someone as laconic, you mean that they use very few words to say something, so that they seem casual or unfriendly. 寡言的; 言簡意賅的

Usually so laconic in the office, Dr. Lahey seemed less guarded, more relaxed. 平常在辦公室裡寡言少語的萊希毉生似乎少了些拘謹，多了幾分輕松。