Hypertext Webster Gateway: "impassable"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Impassable \Im*pass"a*ble\, a. [Cf. {Unpassable}.]
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.
From WordNet (r) 1.7 (wn)
impassable
adj : impossible to pass [syn: {unpassable}] [ant: {passable}]
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