Undered or Underaid: How To spell?

The word Undered is misspelled against Underaid, a verb meaning "To aid clandestinely."

Word contains consecutive vowels 'AI' in between alphabets under & d is misspelled as 'E'
Wrong Spelling:  under-e-d 
Correct Spelling:  under-ai-d 
Explore spell check of Underaid to spell without errors.

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