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