Griningly or Grinningly: How To spell?
The word Griningly is misspelled against Grinningly, an adverb meaning "In a grinning manner."
Grinningly has double "nn" is mispronounced as "n"Remember double 'NN' in between the strings gri & ingly which should not be misspelled with single 'N'
Wrong Spelling:  gri-n-ingly  Correct Spelling:  gri-nn-ingly 
Find more wrongly spelled words of Grinningly to spell it well.