third-person singular simple present indicative form of knuckle down

listen to the pronunciation of third-person singular simple present indicative form of knuckle down
الإنجليزية - الإنجليزية

تعريف third-person singular simple present indicative form of knuckle down في الإنجليزية الإنجليزية القاموس.

Third-person singular simple present indicative form of knuckle down.
knuckles down