/ ɪnˈvɪnsəbl; NAmE / adjective
too strong to be defeated or changed
SYN unconquerable :
The team seemed invincible.
an invincible belief in his own ability
► in·vin·ci·bil·ity / ɪnˌvɪnsəˈbɪləti; NAmE / noun [ U ]
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WORD ORIGIN
late Middle English (earlier than vincible ): via Old French from Latin invincibilis , from in- not + vincibilis (from vincere to overcome).