Drenable or Drainable: How To spell?

The word Drenable is misspelled against Drainable, an adjective meaning "Capable of being drained."

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

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