invincible

Incapable of being overcome or defeated; unconquerable.

Incapable of being conquered or subdued; that cannot be overcome; unconquerable; insuperable: as, an invincible army; invincible difficulties.

One who is invincible. Specifically

A member of an Irish society, organized in 1881, whose avowed object was “to remove all tyrants from the country.”

Incapable of being conquered, overcome, or subdued; unconquerable; insuperable.

Someone or something that cannot be defeated, destroyed or killed.

Impossible to defeat, destroy or kill.

incapable of being overcome or subdued