Ascertaned or Ascertained: How To spell?

The word Ascertaned is misspelled against Ascertained, which is past tense of "Ascertain"

Word contains consecutive vowels 'AI' in between alphabets ascert & ned is misspelled as 'A'
Wrong Spelling:  ascert-a-ned 
Correct Spelling:  ascert-ai-ned 
Explore spell check of Ascertained to spell without errors.

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