Found:

Unergative verb

GENERAL: Special kind of intransitive verb. Semantically, unergative verbs have a subject perceived as actively initiating or actively responsible for the action expressed by the verb. EXAMPLE: in English run, talk and resign are unergative verbs. In syntax, unergative verbs are characterized as verbs with an external argument. See unaccusative verb.

LIT.	Burzio, L. (1986) Perlmutter, D. & P. Postal (1984)