unforthcoming

adjective

un·​forth·​com·​ing ˌən-fȯrth-ˈkə-miŋ 

-ˈfȯrth-ˌkə-

: not forthcoming: such as

a

: not affable or sociable : reticent, reserved

an unforthcoming and taciturn man

b

: not characterized by openness, candidness, or forthrightness

He was unforthcoming about his childhood.

Word History

First Known Use

1920, in the meaning defined above