[N-COUNT 可数名词]硬水软化器,硬水软化剂(可以去除水中某些矿物质,使洗衣时容易产生肥皂泡) 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.
2
[N-MASS 物质名词]织物软化剂,柔顺剂(洗衣时加入水中的一种化学物质,可使衣物手感柔和) A fabric softener is a chemical substance that you add to water when you wash clothes in order to make the clothes feel softer.
Oxford
soft·en·er/ˈsɒfnə(r); NAmEˈsɔːfnər/noun1[countable ]a device that is used with chemicals to make hard water soft (硬水)软化器◆a water softener硬水软化器2[uncountable , countable ]a substance that you add when washing clothes to make them feel soft (衣物的)柔顺剂softenersoftenerssoft·en·er/ˈsɒfnə(r); NAmEˈsɔːfnər/