A person or thing that makes something beautiful or more attractive; something that enhances beauty or aesthetics.
From 'beautify' plus '-er' (agent noun suffix indicating one who does the action). Follows standard English word formation for creating agent nouns from verbs.
A beautifier can be anything from a person doing makeup to a new coat of paint on a building—it's a flexible word that basically means 'whatever made this thing prettier'!
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