Sdygn or Sdeign: How To spell?

The word Sdygn is misspelled against Sdeign, a verb meaning "To disdain."

Word contains consecutive vowels 'EI' in between alphabets sd & gn is misspelled as 'Y'
Wrong Spelling:  sd-y-gn 
Correct Spelling:  sd-ei-gn 
Navigate all incorrect spellings of Sdeign to spell it right.