IPA: //ˈfrɛʃənər//
KK: /ˈfrɛʃənər/
An item or substance that makes something smell better or feel more pleasant.
She used a fabric freshener to keep her clothes smelling nice.
Freshener → It is formed from "fresh" (from Old English *fresca*, meaning new or recently made) and "-er" (meaning a person or thing that performs a specified action). A freshener is something that makes something else fresh or new again.
Think of something that makes things 'new' or 'fresh' — 'fresh' means new, and '-er' indicates it is a thing that performs that action.