Definition of "softener" [sof•ten•er]

• Agent noun of soften; one who softens. (noun)
• A substance added to make something softer. (noun)
• Fabric softener. (noun)

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• "• Skip fabric softener, which is too thick for front loaders."
• "Coz I still don't know what chemical substances are both present in papain and fabric softener which is responsible in softening the cloths."
• "Some soft plastic products contain a "softener" called DINP, which can cause liver and kidney damage as well as cancer."