taciturn
adjective /ˈtæsɪtɜːn/
/ˈtæsɪtɜːrn/
(formal)- tending not to say very much, in a way that seems unfriendly
- a taciturn and serious young man
Word Originlate 18th cent.: from Latin taciturnus, from tacitus, past participle of tacere ‘be silent’.