Dictionary
nig•gling
Pronunciation: (nig'ling), [key]—
adj.
1. petty; trivial; inconsequential:
to quibble about a niggling difference in terminology.
2. demanding too much care, attention, time, etc.:
niggling chores about the house. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.