不可逆 Traditional form: 不可逆 Pinyin (reading): bùkěnì Definitions: irreversible Characters: 不 - no, not, un-; negative prefix 可 - may, can, -able; possibly 逆 - to disobey, to rebel; traitor, rebel Traditional characters: 不 - no, not, un-; negative prefix 可 - may, can, -able; possibly 逆 - to disobey, to rebel; traitor, rebel