The word Impasable is misspelled against Impassable, meaning "That can not be passed through or over."
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Impassable has double "ss" is mispronounced as "s"
Remember double 'SS' in between the strings impa & able which should not be misspelled with single 'S'
Wrong Spelling: impa-s-able
Correct Spelling: impa-ss-able
Explore spell check of Impassable to spell without errors.