Softener (noun)

1. A substance used to make something softer.
2. A device that softens hard water.
3. A product that makes clothes or fabrics feel softer or less stiff.

Origin:

Early 17th century (as a verb in the sense "make soft"): from soft + -ener.

Examples:

1. She added a fabric softener to the final rinse cycle.
2. The water softener unit installed on his house uses salt to remove minerals that make the water hard.
3. The new type of softener is designed to be added during the wash cycle, leaving clothes feeling and smelling fresh.
4. Some people prefer to use natural softeners like baking soda or white vinegar to avoid any chemicals.
5. The use of softeners can prolong the life of clothes and make them more comfortable to wear.