The word Impermable is misspelled against Impermeable, meaning "that cannot be permeated"
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Impermeable has vowels 'ea' together mispronounced as 'a'
Word contains consecutive vowels 'EA' in between alphabets imperm & ble is misspelled as 'A'
Wrong Spelling:  imperm-a-ble 
Correct Spelling:  imperm-ea-ble 
Explore spell check of Impermeable to spell without errors.