Abstoned or Abstained: How To spell?

The word Abstoned is misspelled against Abstained, which is past tense of "Abstain"

Word contains consecutive vowels 'AI' in between alphabets abst & ned is misspelled as 'O'
Wrong Spelling:  abst-o-ned 
Correct Spelling:  abst-ai-ned 
Find more incorrect spellings of Abstained to spell right way.

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