conditioner
noun [ C or U ] uk/kənˈdɪʃ.ən.ər/ us/kənˈdɪʃ.ən.ɚ/
护发素，护发剂
a thick liquid that you put on and wash off your hair after you have washed it, to improve the quality and appearance of your hair
（衣物）柔顺剂，柔软剂
a thick liquid that you wash clothes in to make them feel soft
fabric conditioner 织物柔顺剂