The word Dreinable is misspelled against Drainable, an adjective meaning "Capable of being drained."
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Word contains consecutive vowels 'AI' in between alphabets dr & nable is misspelled as 'EI'
Wrong Spelling:  dr-ei-nable 
Correct Spelling:  dr-ai-nable 
Find more wrongly spelled words of Drainable to spell it well.