Unpasable or Unpassable: How To spell?

The word Unpasable is misspelled against Unpassable, an adjective meaning "Impassable."

Unpassable has double "ss" is mispronounced as "s"
Remember double 'SS' in between the strings unpa & able which should not be misspelled with single 'S'
Wrong Spelling:  unpa-s-able 
Correct Spelling:  unpa-ss-able 
Explore spell check of Unpassable to spell without errors.

You might be interested to know

Acquital or Acquittal?

Atain or Attain?

Atenuate or Attenuate?