1. niggle - verb
· worry unnecessarily or excessively; "don't fuss too much over the grandchildren--they are quite big now"
Hypernym(s): worry
2. niggle - verb
· argue over petty things; "Let's not quibble over pennies"
Synonym(s): quibble, pettifog, bicker, squabble, brabble
Hypernym(s): argue, contend, debate, fence
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