Synonyms of insurmountable

Adjective

1. insurmountable (vs. surmountable), unsurmountable, insuperable, unconquerable, impossible, unconquerable

usage: not capable of being surmounted or overcome; "insurmountable disadvantages"

2. insuperable, insurmountable, unconquerable (vs. conquerable)

usage: impossible to surmount

Definition and meaning of insurmountable (Dictionary)