commutative
/kəˈmjuːtətɪv/adjective
1- Mathematics involving the condition that a group of quantities connected by operators gives the same result whatever the order of the quantities involved, e.g. a × b = b × a【数】交换的（如a × b = b × a）。
1.1
- rare (generally) relating to or involving substitution or exchange〈罕〉（一般）代替的; 交换的。
词源
mid 16th cent. （in the sense 'relating to transactions between people'）： from French commutatif, -ive or medieval Latin commutativus, from commutat- 'exchanged', from the verb commutare （see COMMUTE）.