Ascertun or Ascertain: How To spell?

The word Ascertun is misspelled against Ascertain, meaning "get to know"

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

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