Undernaith or Underneath: How To spell?
The word Undernaith 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 'ai'Word contains consecutive vowels 'EA' in between alphabets undern & th is misspelled as 'AI'
Wrong Spelling:  undern-ai-th  Correct Spelling:  undern-ea-th 
Find more wrongly spelled words of Underneath to spell it well.