Trefuls or Treefuls: How To spell?
The word Trefuls is misspelled against Treefuls, which is plural of "Treeful"
Treefuls has double "ee" is mispronounced as "e"Remember double 'EE' in between the strings Tr & fuls which should not be misspelled with single 'E'
Wrong Spelling:  Tr-e-fuls  Correct Spelling:  Tr-ee-fuls 
Check more misspelled words of Treefuls to spell it correct.