invincible
adjective
[ ɪnˈvɪnsɪb(ə)l ]
• too powerful to be defeated or overcome.
• "an invincible warrior"
Similar:
invulnerable,
indestructible,
unconquerable,
unbeatable,
indomitable,
unassailable,
unyielding,
unflinching,
unbending,
unshakeable,
indefatigable,
dauntless,
impregnable,
inviolable,
secure,
safe,
Origin:
late Middle English (earlier than vincible ): via Old French from Latin invincibilis, from in- ‘not’ + vincibilis (see vincible).