taciturn
adjective
[ ˈtasɪtəːn ]
• (of a person) reserved or uncommunicative in speech; saying little.
• "after such gatherings she would be taciturn and morose"
Similar:
untalkative,
uncommunicative,
reticent,
unforthcoming,
quiet,
unresponsive,
secretive,
silent,
tight-lipped,
close-mouthed,
mute,
dumb,
inarticulate,
reserved,
withdrawn,
introverted,
retiring,
media-shy,
antisocial,
unsociable,
distant,
aloof,
stand-offish,
cold,
detached,
dour,
sullen,
Origin:
late 18th century: from Latin taciturnus, from tacitus (see tacit).