Instinctive

Part of speech: adjective (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 give Each grace appropriate. Mason. Have we had instinctive intimations of the death of some absent friends Bp. Hall.

Synonyms: Natural; voluntary; spontaneous; original; innate; inherent; automatic.