impassable Meaning, Definition & Usage

  1. adjective incapable of being passed
    unpassable.

WordNet

Im*pass"a*ble adjective
Etymology
Cf. Unpassable.
Definitions
  1. Incapable of being passed; not admitting a passage; as, an impassable road, mountain, or gulf. Milton. -- Im*pass"a*ble*ness, n. -- Im*pass"a*bly, adv.

Webster 1913