Undernayth or Underneath: How To spell?

The word Undernayth is misspelled against Underneath, an adverb meaning "Beneath; below; in a lower place; under; as, a channel underneath the soil."

Underneath has vowels 'ea' together mispronounced as 'ay'
Word contains consecutive vowels 'EA' in between alphabets undern & th is misspelled as 'AY'
Wrong Spelling:  undern-ay-th 
Correct Spelling:  undern-ea-th 
Explore spell check of Underneath to spell without errors.

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