本能 (běn néng) literally combines 本 (běn), meaning 'origin' or 'inherent', and 能 (néng), meaning 'ability' or 'capacity'. Together, they form the concept of an innate, automatic behavior that requires no learning or conscious thought — what English calls 'instinct'. This word is commonly used to describe biological drives in humans and animals, such as a baby’s reflex to suckle, a bird’s urge to migrate, or a person’s immediate reaction to danger.

In Chinese, 本能 carries a neutral-to-scientific tone and appears frequently in biology, psychology, and everyday discussion of human nature. It contrasts with learned behaviors (learned through experience or education) and emphasizes what is hardwired by evolution or biology. While often associated with survival-related actions (e.g., fleeing, fighting, nurturing), it can also refer more broadly to deeply rooted emotional or social tendencies, like the instinct to protect one’s family or feel empathy.