Cognate object

In linguistics, a cognate object (or cognate accusative) is a verb's object that is etymologically related to the verb. More specifically, the verb is one that is ordinarily intransitive (lacking any object), and the cognate object is simply the verb's noun form. For example, in the sentence He slept a troubled sleep, sleep is the cognate object of the verb slept. This construction also has a passive form. The passive is A troubled sleep was slept by him. Cognate objects exist in many languages, including various unrelated ones; for example, they exist in Arabic, Chichewa, English, German, Ancient Greek, Hebrew, Icelandic, Korean, Latin, and Russian.