The word Impurer is misspelled against Impairer, a noun meaning "One who, or that which, impairs."
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Word contains consecutive vowels 'AI' in between alphabets imp & rer is misspelled as 'U'
Wrong Spelling:  imp-u-rer 
Correct Spelling:  imp-ai-rer 
Check more misspelled words of Impairer to spell it correct.