niggling

动词 niggle:

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

形容词 niggling:

1. (informal) small and of little importance
   同义词：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.
   我不明白他们为什么对这笔基金投入几镑钱而如此在乎。
2. A pointless dispute over niggling details.
   在琐碎小事上的一次无礼争吵
3. Stop niggling about every penny we spend.
   别再为我们花的每个小钱费心思了。

nig.gling

adj.（形容词）
Petty, especially in a nagging or annoying way; trifling:
微不足道的：细小的，尤指用喋喋不休的或让人太厌烦的方法；微不足道的：
例句：
a pointless dispute over niggling details.
在琐碎小事上的一次无礼争吵

Overly concerned with details; exacting and fussy.
过分注意细节的，吹毛求疵的：过于注重细节的；苛求的和繁琐的

【引伸】
nig.gling
n.（名词）
nig.glingly
adv.（副词）