1. to cause slight but persistent annoyance, discomfort, or anxiety
Usage: third person singular present
2. to find fault with in a petty way; to criticize minor details
Usage: third person singular present

1. minor criticisms or complaints about small details
Usage: plural

Examples

• The loose thread on her sweater niggles at her all day.
• Something about his story niggles me, but I can’t figure out what.
• She constantly niggles about the way he loads the dishwasher.
• He niggles over every small expense in the budget.
• I’m tired of hearing your niggles about the new policy.
• The coach addressed all the players’ niggles about the training schedule.
• Her back injury still niggles when she sits too long.