The word Impasible is misspelled against Impassible, meaning "Not moved or affected by feeling."
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Impassible has double "ss" is mispronounced as "s"
Remember double 'SS' in between the strings impa & ible which should not be misspelled with single 'S'
Wrong Spelling:  impa-s-ible 
Correct Spelling:  impa-ss-ible 
Find more wrongly spelled words of Impassible to spell it well.