The word Nigling is misspelled against Niggling, which is present continuous of "Niggle"
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Niggling has double "gg" is mispronounced as "g"
Remember double 'GG' in between the strings ni & ling which should not be misspelled with single 'G'
Wrong Spelling: ni-g-ling
Correct Spelling: ni-gg-ling
Find more wrongly spelled words of Niggling to spell it well.