Qui ne peut être surmonté. Des difficultés insurmontables.
ETYM Latin insuperabilis: cf. Old Fren. insuperable. Related to In- not, and Superable.
1. Impossible to surmount; SYN. insurmountable.
2. Incapable of being surmounted or excelled; SYN. unconquerable.
ETYM Pref. in- not + surmountable: cf. French insurmountable.
Not capable of being surmounted or overcome; SYN. unsurmountable.