noun
ergative verb
Linguistics term for a verb that can be used both transitively and intransitively, where the object of the transitive use corresponds to the subject of the intransitive use.
「開く」は能格動詞の一例です。
"開く" is an example of an ergative verb.
Compound of 能格 (ergative case) + 動詞 (verb). The exact historical derivation is uncertain; the term is a modern linguistic calque.