Nag
Nag (nag) , noun
[Old English nagge, Dutch negge; akin to English neigh.]
1.
A small horse; a pony; hence, any horse, especially one that is of inferior breeding or useless.
2.
A paramour; -- in contempt. [Obsolete] — Shakespeare
Nag , verb, transitive and intransitive
[Compare Swedish nagga to nibble, peck, Danish nage to gnaw, Icelandic naga, gnaga, German nagen, & English gnaw.]
To tease in a petty way; to scold habitually; to annoy; to fret pertinaciously. [Colloquial]
She never nagged.
Nag (nag) , noun
A person who nags, especially habitually; called also nagger.