Nag \Nag\, v. t. & i. [imp. & p. p. {Nagged}; p. pr. & vb. n.
{Nagging}.] [Cf. Sw. nagga to nibble, peck, Dan. nage to
gnaw, Icel. naga, gnaga, G. nagen, & E. gnaw.]
To tease in a petty way; to scold habitually; to annoy; to
fret pertinaciously. [Colloq.] "She never nagged." --J.
Ingelow.
[1913 Webster]