名詞 nag:

1. someone (especially a woman) who annoys people by constantly finding fault
   同義詞：scold, scolder, nagger, common scold
2. an old or over-worked horse
   同義詞：hack, jade, plug

動(dòng)詞 nag:

1. bother persistently with trivial complaints
   同義詞：peck, hen-peck
2. worry persistently
3. remind or urge constantly

1. Some children complain that their parents nag at them.
   一些孩子報(bào)怨他們父母老是數(shù)落他們。
2. Don't nag me!
   別在我面前嘮叨！

nag

v.（動(dòng)詞）
nagged,nag.ging,nags
v.tr.（及物動(dòng)詞）
To annoy by constant scolding, complaining, or urging.
不斷找岔，抱怨：由不斷的責(zé)罵、抱怨或催促而產(chǎn)生的煩惱
To torment persistently, as with anxiety or pain.
困擾，折磨：如不安或憂慮一直困擾
v.intr.（不及物動(dòng)詞）
To scold, complain, or find fault constantly:
叱責(zé)，抱怨：不斷地責(zé)罵、挑剔或強(qiáng)求：
例句：
nagging at the children.
不斷責(zé)罵孩子

To be a constant source of anxiety or annoyance:
困擾，焦慮：成為長(zhǎng)期不安或煩惱的根源：
例句：
The half-remembered quotation nagged at my mind.
依稀記起的引言令我不安

n.（名詞）
One who nags.
挑剔的人

來源：
[Probably of Scandinavian origin] ; akin to Old Norse gnaga [to bite, gnaw]
[可能源于斯堪的納維亞語] ；類似于 古斯堪的納維亞語 gnaga [咬，啃]

【引伸】
nag.ger
n.（名詞）
nag.gingly
adv.（副詞）

---------------另--------------
nag
nag 2

n.（名詞）
A horse, especially:
馬，尤指
An old or worn-out horse.
老馬，疲倦的馬
Slang A racehorse.
【俚語】 賽馬
Archaic A small saddle horse or pony.
【古語】 套馬鞍的馬或小馬

來源：
Middle English nagge
中古英語 nagge
[possibly of Low German origin]
[可能源于低地德語]