Underdrun or Underdrain: How To spell?

The word Underdrun is misspelled against Underdrain, a noun meaning "An underground drain or trench with openings through which the water may percolate from the soil or ground above."

Word contains consecutive vowels 'AI' in between alphabets underdr & n is misspelled as 'U'
Wrong Spelling:  underdr-u-n 
Correct Spelling:  underdr-ai-n 
Check more misspelled words of Underdrain to spell it correct.

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