Ambitransitive verb

From Teflpedia

An ambitransitive verb (/æmbi:trænzətɪv( v)ɜ:b/) is a verb that has a variable transitivity, so can be used either as a transitively (with a direct object) or an intransitively (without a direct object). That means they can be used in the passive voice.

For example, the English verb "sing" is an ambitransitive verb:

Type Example
Intransitive "Mary sings"
Transitive, active voice "Mary sings a song"
Passive "The song was sung (by Mary)"

Ambitransitive verbs can be further divided into ergative verbs and (I think) non-ergative verbs.