unsell

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un·sell

U0114300 (ŭn-sĕl′)tr.v. un·sold (-sōld′), un·sell·ing, un·sells To persuade not to believe in the advisability, worth, or truth of something.

unsell

(ʌnˈsɛl) vb (tr) to speak unfavourably and off-puttingly of (something or someone)

un•sell

(ʌnˈsɛl)

v.t. -sold, -sell•ing. to dissuade from a belief in the desirability, value, wisdom, or truth of something. [1925–30]