Sulless or Sailless: How To spell?

The word Sulless is misspelled against Sailless, an adjective meaning "Destitute of sails."

Word contains consecutive vowels 'AI' in between alphabets s & lless is misspelled as 'U'
Wrong Spelling:  s-u-lless 
Correct Spelling:  s-ai-lless 
Check more misspelled words of Sailless to spell it correct.

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