Gruf or Gruff: How To spell?
The word Gruf is misspelled against Gruff, a comparative word meaning "a rough or stern manner, voice, or countenance; sour; surly; severe; harsh."
Gruff has double 'ff' in the end mispronounced as 'f'Remember double 'FF' appears in the end of this word which should not be misspelled with single 'F'
Wrong Spelling:  gru-f  Correct Spelling:  gru-ff 
Check more misspelled words of Gruff to spell it correct.