Ascertianed or Ascertained: How To spell?

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

Word contains consecutive vowels 'AI' in between alphabets ascert & ned is misspelled as 'IA'
Wrong Spelling:  ascert-ia-ned 
Correct Spelling:  ascert-ai-ned 
Find more wrongly spelled words of Ascertained to spell it well.

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