The word Imposible is misspelled against Impossible, a noun meaning "An impossibility."
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Impossible has double "ss" is mispronounced as "s"
Remember double 'SS' in between the strings impo & ible which should not be misspelled with single 'S'
Wrong Spelling:  impo-s-ible 
Correct Spelling:  impo-ss-ible 
Find more incorrect spellings of Impossible to spell right way.