nag1
¦ verb (nags, nagging, nagged)
1. constantly ask (someone) to do something which they are reluctant to do.
2. [often as adjective nagging] be persistently painful or worrying to.
¦ noun
1. a person who nags.
2. a persistent feeling of anxiety: he felt a little nag of doubt.
Derivatives
nagger noun
naggingly adverb
naggy adjective
Origin
C19 (orig. dialect in the sense 'gnaw'): perh. of Scand. or Low Ger. origin.
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nag2
¦ noun informal, often derogatory a horse, especially one that is old or in poor health.
?archaic a horse suitable for riding rather than as a draught animal.
Origin
ME: of unknown origin.