tenderizer
/ˈtendəraɪzə(r)/(亦作-iser)
noun
1- a thing used to make meat tender, in particular（肉类）软化剂, 嫩化剂, 尤指：
1.1
- a substance such as papain which is rubbed on to meat or used as a marinade to soften the fibres（用于涂抹、腌泡以软化肉类纤维的）木瓜蛋白酶; 嫩肉粉。
1.2
- a small hammer with teeth on the head, used to beat meat捶肉槌。