Slun or Slain: How To spell?

The word Slun is misspelled against Slain, which is past perfect of "Slay"

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

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