niggle

To cause one to be persistently preoccupied, annoyed, or uncomfortable.

To pester someone or be annoying or uncomfortable in a persistent way.

To be overly concerned or argumentative, especially about something petty; fuss.

To preoccupy, annoy, make uncomfortable in a persistent way.

To pester or nag (someone).

To eat sparingly; nibble.

To act in a mincing manner; work in a finicking, fussy way.

To trifle; be employed in trifling or petty carping.

To fret; complain of trifles.

. To draw out unwillingly; squeeze out or hand out slyly.