IPA: /ˈsɔːftənər/
KK: /ˈsɔftənər/
A substance that is used to make something softer, often used in laundry to make clothes feel smoother.
I added fabric softener to the wash to make my clothes feel softer.
Softener → It is formed from "soft" (from Old English *softe*, meaning not hard or firm) and "-ener" (a suffix used to indicate a person or thing that performs a specific action). The word "softener" refers to a substance that makes something softer.
Think of something that makes things 'not hard' ('soft') — that's what a softener does.