com·mute /kə-'myüt/ vt com·mut·ed, com·mut·ing
1: to convert (as a payment) into another form
2: to change (a penalty) to one less severe esp. out of clemency compare pardon
com·mu·ta·tion /ˌkä-myə-'tā-shən/ n
com·mu·ta·tive /kə-'myü-tə-tiv, 'kä-myə-ˌtā-tiv/ adj
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.