Definition of unpopularize in English:

unpopularize

Pronunciation /(ˌ)ʌnˈpɒpjʊlərʌɪz/

verb

  • with object To make (a person or thing) no longer popular; to render less popular.

Origin

Late 18th century; earliest use found in World. From un- + popularize, originally after French dépopulariser depopularize.