IPA: /ˈnɪɡlɪŋli/
KK: /ˈnɪɡlɪŋli/
In a manner that causes slight but persistent annoyance or discomfort.
She nigglingly pointed out every mistake I made during the presentation.
Nigglingly → It is formed from "niggling" (from the verb "niggle", which is of uncertain origin but possibly related to the dialectal English word "niggle", meaning to fuss or worry) and the suffix "-ly" (meaning in a manner of). The word "nigglingly" describes doing something in a manner that is fussing or worrying, often in a trivial way.
Think of someone who is 'fussing' or 'worrying' about small details ('niggling') and doing it 'in a manner' ('-ly'). This helps you remember that 'nigglingly' means to do something in a fussing or worrying way.