Tril or Trill: How To spell?
The word Tril is misspelled against Trill, a noun meaning "A shake or quaver of the voice in singing, or of the sound of an instrument, produced by the rapid alternation of two contiguous tones of the scale; as, to give a trill on the high C. See Shake."
Trill has double 'll' in the end mispronounced as 'l'Remember double 'LL' appears in the end of this word which should not be misspelled with single 'L'
Wrong Spelling:  tri-l  Correct Spelling:  tri-ll 
Find more wrongly spelled words of Trill to spell it well.