Adjective: insurmountable ,in-su(r)'mawn-tu-bul
- Not capable of being surmounted or overcome
"insurmountable disadvantages";
- unsurmountable
- Impossible to surmount
"The insurmountable obstacle of limited funding halted the project";
- insuperable
See also: impossible, insuperable, unconquerable
Antonym: surmountable