adj. Function: adjective
1 not allowing passage FF1C; an impassable barrier FF1E;
Synonyms: impenetrable, impermeable, imperviable, impervious, unpierceable
Contrasted Words: penetrable, permeable, pervious
Antonyms: passable
2
Synonyms: INSUPERABLE , inconquerable, indomitable, insurmountable, invincible, unconquerable, unsurmountable