Gram. a substantive functioning as the object of a verb, esp. of a verb that is usually intransitive, when both object and verb are derived from the same root. Speech in Speak the speech is a cognate object.
[ 1875-80 ]
COGNATE OBJECT
Meaning of COGNATE OBJECT in English
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012