The word Grining is misspelled against Grinning, which is present continuous of "Grin"
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Grinning has double "nn" is mispronounced as "n"
Remember double 'NN' in between the strings gri & ing which should not be misspelled with single 'N'
Wrong Spelling: gri-n-ing
Correct Spelling: gri-nn-ing
Find more wrongly spelled words of Grinning to spell it well.