to annoy by persistent faultfinding, complaints, or demands.

to keep in a state of troubled awareness or anxiety, as a recurrent pain or problem

She had certain misgivings that nagged her.

to find fault or complain in an irritating, wearisome, or relentless manner (often fol. by at )

If they start nagging at each other, I'm going home.

to cause pain, discomfort, distress, depression, etc. (often fol. by at )

This headache has been nagging at me all day.

Also, nagger. a person who nags, esp. habitually.

an act or instance of nagging.

verb

assuage , please

verb

annoy , badger , bait , berate , bug * , carp at , dog * , eat * , egg * , find fault , fuss , give a hard time , goad , harry , heckle , hector , hound , importune , irk , irritate , needle , nudge * , pester , pick at , plague , prod , provoke , ride , scold , take it out on , tease , torment , upbraid , urge , vex , work on , worry , fuss at , peck at , pick on , (colloq.) plague , ache , aggravate , bother , hackney , harangue , harass , harp , henpeck , horse , jade , noodge , nudge , plug , racehorse , twit