Noah Webster
Passable
P'ASSABLE, adjective That may be passed, traveled or navigated. The roads are not passable The stream is passable in boats.
1. That may be penetrated; as a substance passable by a fluid.
2. Current; receivable; that may be or is transferred from hand to hand; as bills passable in lieu of coin. False coin is not passable
3. Popular; well received.
4. Supportable. [This should be passible.]