unbridgeable
adjEtymology From un- + bridge + -able.
1
Unable to be bridged or crossed; impossible to span.
- The gap between feather-assisted running and feather-assisted flying seemed evolutionarily unbridgeable. But now again the notion of ground-travel aerodynamics is being given some careful thought.1988, David Quammen, The Flight of the Iguana:
- Derived terms
- unbridgeableness, unbridgeably