[{"Bold_text": "verb (used without object)", "List Items": ["to criticize, especially constantly or repeatedly, in a peevish or petty way; carp:to niggle about the fine points of interpretation; preferring to niggle rather than take steps to correct a situation.", "to spend too much time and effort on inconsequential details:It's difficult to be meticulous and not niggle.", "to work ineffectively; trifle:to niggle with an uninteresting task."]}]