noun
cognate object
A grammatical term for an object that shares the same root or meaning as the verb, such as 歌を歌う (sing a song). Used in linguistics and language study.
「歌を歌う」の「歌」は同族目的語と呼ばれる。
The 'uta' in 'uta o utau' (sing a song) is called a cognate object.
Compound of 同族 (same family) + 目的語 (object), a calque from Western grammatical terminology.