A fabric softener is a chemical substance that you add to water when you wash clothes in order to make the clothes feel softer. a substance that you add to water to make clothes feel soft after washing
{i} something that makes soft; liquid substance added to laundry to increase its softness
A water softener is a device or substance which removes certain minerals, for example calcium, from water, so that it makes bubbles easily when you use soap to wash things
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