Grined or Grinned: How To spell?
The word Grined is misspelled against Grinned, which is past tense of "Grin"
Grinned has double "nn" is mispronounced as "n"Remember double 'NN' in between the strings gri & ed which should not be misspelled with single 'N'
Wrong Spelling:  gri-n-ed  Correct Spelling:  gri-nn-ed 
Find more wrongly spelled words of Grinned to spell it well.