uncommunicative
un-com-mu-ni-ca-tive
adjective
Not inclined to talk or share thoughts and feelings with others.
"She became rather uncommunicative after the meeting."
Thesaurus
Synonyms: poker-faced, impassive, closemouthed, mum, unutterable, inexpressive, incommunicative, unexpressive, silent, expressionless, close, incommunicado
Antonyms: communicative, communicatory