Verb niggle has 2 senses
  1. fuss, niggle, fret - worry unnecessarily or excessively; "don't fuss too much over the grandchildren--they are quite big now"
    --1 is one way to worry
    Sample sentence:
    Sam and Sue niggle over the results of the experiment
  2. quibble, niggle, pettifog, bicker, squabble, brabble - argue over petty things; "Let's not quibble over pennies"
    --2 is one way to argue, contend, debate, fence
    Derived form: noun niggler1
    Sample sentences:
    Somebody ----s
    Somebody ----s PP
,
TOP