unsell

verb

un·​sell ˌən-ˈsel 

unsold ˌən-ˈsōld  ; unselling

transitive verb

1

: to dissuade from a belief in the truth, value, or desirability of something

ads that unsell the public on energy consumption

2

: to discourage a belief in the truth, value, or desirability of

I unsold the coat he wanted and sold him another

Word History

First Known Use

circa 1929, in the meaning defined at sense 1