動詞 niggle:

1. worry unnecessarily or excessively
   同義詞：fuss, niggle, fret
2. argue over petty things
   同義詞：quibble, niggle, pettifog, bicker, squabble, brabble

形容詞 niggling:

1. (informal) small and of little importance
   同義詞：fiddling, footling, lilliputian, little, piddling, piffling, petty, picayune, trivial

1. I don't see why they should be niggling over paying a few pounds into the fund.
   我不明白他們?yōu)槭裁磳@筆基金投入幾鎊錢而如此在乎。
2. A pointless dispute over niggling details.
   在瑣碎小事上的一次無禮爭吵
3. Stop niggling about every penny we spend.
   別再為我們花的每個小錢費心思了。

nig.gling

adj.（形容詞）
Petty, especially in a nagging or annoying way; trifling:
微不足道的：細(xì)小的，尤指用喋喋不休的或讓人太厭煩的方法；微不足道的：
例句：
a pointless dispute over niggling details.
在瑣碎小事上的一次無禮爭吵

Overly concerned with details; exacting and fussy.
過分注意細(xì)節(jié)的，吹毛求疵的：過于注重細(xì)節(jié)的；苛求的和繁瑣的

【引伸】
nig.gling
n.（名詞）
nig.glingly
adv.（副詞）