Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb niggle
2 senses of niggle
Sense 1
fuss, niggle, fret -- (worry unnecessarily or excessively; "don't fuss too much over the grandchildren--they are quite big now")
=> worry -- (be worried, concerned, anxious, troubled, or uneasy; "I worry about my job")
Sense 2
quibble, niggle, pettifog, bicker, squabble, brabble -- (argue over petty things; "Let's not quibble over pennies")
=> argue, contend, debate, fence -- (have an argument about something)
Antonyms of adj niggling
1 sense of niggling
Sense 1
fiddling, footling, lilliputian, little, niggling, piddling, piffling, petty, picayune, trivial -- ((informal) small and of little importance; "a fiddling sum of money"; "a footling gesture"; "our worries are lilliputian compared with those of countries that are at war"; "a little (or small) matter"; "a dispute over niggling details"; "limited to petty enterprises"; "piffling efforts"; "giving a police officer a free meal may be against the law, but it seems to be a picayune infraction")
INDIRECT (VIA unimportant) -> important, of import -- (of great significance or value; "important people"; "the important questions of the day")
Similarity of adj niggling
1 sense of niggling
Sense 1
fiddling, footling, lilliputian, little, niggling, piddling, piffling, petty, picayune, trivial -- ((informal) small and of little importance; "a fiddling sum of money"; "a footling gesture"; "our worries are lilliputian compared with those of countries that are at war"; "a little (or small) matter"; "a dispute over niggling details"; "limited to petty enterprises"; "piffling efforts"; "giving a police officer a free meal may be against the law, but it seems to be a picayune infraction")
=> unimportant (vs. important) -- (not important; "a relatively unimportant feature of the system"; "the question seems unimportant")