INSTINCTIVE a.
Of or pertaining to instinct; derived from, or prompted by, instinct; of the nature of instinct; determined by natural impulse or propensity; acting or produced without reasoning, deliberation, instruction, or experience; spontaneous. "Instinctive motion." Milton. "Instinctive dread." Cowper. With taste instinctive giv…
INVINCIBLE a.
Incapable of being conquered, overcome, or subdued; unconquerable; insuperable; as, an invincible army, or obstacle. Lead forth to battle these my sons Invincible. Milton. -- In*vin"ci*ble*ness, n. -- In*vin"ci*bly, adv.