- 1 [intransitive, transitive] niggle (at somebody) to irritate or annoy someone slightly; to make someone slightly worried synonym bother A doubt niggled at her.
- 2 [intransitive] niggle (about/over something) to argue about something unimportant; to criticize someone for something that is not important synonym quibble
NAmE//ˈnɪɡl//Verb Forms present simple I / you / we / they niggle
he / she / it niggles
past simple niggled
-ing form niggling