Suppletion

异干交替

A term used in morphology to refer to cases where it is not possible to show a relationship between morphemes through a general rule, because the forms involved have different roots. A suppletive is the grammar’s use of an unrelated form (i.e. with a different root) to complete a paradigm, as in the present-past-tense relationship of go-went, or the comparative form better in relation to good.

形态学术语，指不能用一般规则说明两个语素间关系的情形，因为两个语素有不同的词根。异干替换词指语法用一个不相关的形式（即不同词根的形式）来填补一个词形变化表，例如go“去”（现在时）的过去时形式went，good“好”的比较级形式better“较好”。