Trelis or Trellis: How To spell?
The word Trelis is misspelled against Trellis, a noun meaning "A structure or frame of crossbarred work, or latticework, used for various purposes, as for screens or for supporting plants."
Trellis has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings tre & is which should not be misspelled with single 'L'
Wrong Spelling:  tre-l-is  Correct Spelling:  tre-ll-is 
Find more wrongly spelled words of Trellis to spell it well.