Tredle or Treadle: How To spell?
The word Tredle is misspelled against Treadle, a noun meaning "The chalaza of a bird's egg; the tread."
Treadle has vowels 'ea' together mispronounced as 'e'Word contains consecutive vowels 'EA' in between alphabets tr & dle is misspelled as 'E'
Wrong Spelling:  tr-e-dle  Correct Spelling:  tr-ea-dle 
Explore spell check of Treadle to spell without errors.