"annoy by scolding," 1828, originally a dialectal word meaning "to gnaw" (1825), probably ultimately from a Scandinavian source (compare Old Norse gnaga "to complain," literally "to bite, gnaw," dialectal Swedish and Norwegian nagga "to gnaw"), from Proto-Germanic *gnagan, related to Old English gnagan "to gnaw" (see gnaw). Related: Nagged; nagger; nagging.
nag (n.)
"old horse," c. 1400, nagge "small riding horse," of unknown origin, perhaps related to Dutch negge, neg (but these are more recent than the English word), perhaps related in either case to imitative neigh. Term of abuse is a transferred sense, first recorded 1590s.
例文
1. Aunt Molly is a nag about regular meals.
モリーおばさんは1日3食とも選り好みをする人です。
2.The suspicion that she was lying continued to nag at me.
私は彼女が嘘をついていると疑って、それは私を悩ませてやまない。
3. There was a positive correlation between GPDA and N acetyl ? ? D glucosa minidase ( NAG ), urine minimal albumen ( UmA ).
尿GPDAは、NアセチルβDアミノグルコシダーゼ（ NAG ）および尿微量アルブミン（UmA）と有意に正の相関を示した。dd>
4.The contents of the plasma ET，Bun，Cr and urine NAG ，RBP，α1-MG and？-GTP were determined.
両群の患者はそれぞれ麻酔前、手術後24 h、48 h、72 hで血漿内皮素、尿素窒素、クレアチニン含有量と尿 NAG 、RBP、α1-MG、γ-GTP含有量を検出した。
5. Methods 24 hour urinary ablumin ( Alb ), transferrin ( TRF ), IgG, retinal - bingding protein ( RBP ), N - acetyl - glucosaminidase ( NAG ) , fasting blood glucose, blood creatinine ( Scr ) and so on were measured.
方法104例2型糖尿病患者24 hアルブミン（Alb）、トランスフェリン（TRF）、NアセチルβDアミノグルコシダーゼ（ NAG ）、免疫グロブリン（IgG）、レチノール結合蛋白（RBP）及び空腹血糖、血尿素窒素等の指標を測定した。