VULGARISE
vulgarize, vulgarise
(verb) act in a vulgar manner; “The drunkard tends to vulgarize”
vulgarise, vulgarize
(verb) debase and make vulgar; “The Press has vulgarized Love and Marriage”
popularize, popularise, vulgarize, vulgarise, generalize, generalise
(verb) cater to popular taste to make popular and present to the general public; bring into general or common use; “They popularized coffee in Washington State”; “Relativity Theory was vulgarized by these authors”
Source: WordNet® 3.1
Verb
vulgarise (third-person singular simple present vulgarises, present participle vulgarising, simple past and past participle vulgarised)
Non-Oxford British standard spelling of vulgarize.
Source: Wiktionary