1. 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.
2. to spend too much time and effort on inconsequential details: It's difficult to be meticulous and not niggle.
3. to work ineffectively; trifle: to niggle with an uninteresting task.
"people can be niggled with opinions."
"people can be niggled by doubts."
"people can be niggled at things."
"people can be niggled about parameters."
"people can be niggled."
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