Fiddle with and Niggle

Fiddle with verb - To handle thoughtlessly, ignorantly, or mischievously.

Niggle and fiddle with are semantically related. In some cases you can use "Niggle" instead a verb "Fiddle with".

Niggle verb - To make often peevish criticisms or objections about matters that are minor, unimportant, or irrelevant.

Fiddle with and niggle are semantically related. Sometimes you can use "Fiddle with" instead a verb "Niggle".