Labile verb
In general linguistics, a labile verb (or ergative / diffused / ambivalent verb) is a verb that undergoes causative alternation; that is, it can be used both transitively and intransitively, with the requirement that the direct object of its transitive use corresponds to the subject of its intransitive use, as in "I ring the bell" and "The bell rings." Labile verbs are a prominent feature of English, and also occur in many other languages. This behavior can be seen as evidence that the distribution of verb classes in that language does not depend on transitivity.