Incerteyn or Incertain: How To spell?

The word Incerteyn is misspelled against Incertain, a noun meaning "Uncertain; doubtful; unsteady."

Word contains consecutive vowels 'AI' in between alphabets incert & n is misspelled as 'EY'
Wrong Spelling:  incert-ey-n 
Correct Spelling:  incert-ai-n 
Explore spell check of Incertain to spell without errors.

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