IPA: /ˈɪn.stɪŋkt/
KK: /ˈɪnˌstɪŋkt/
A natural tendency or ability that is not learned but is inherent in a person or animal.
Her instinct told her to be cautious in the unfamiliar situation.
A natural ability or urge to behave in a certain way, often without thinking about it. It is something that is built into an organism and helps it respond to its environment.
Birds have a strong instinct to migrate when the seasons change.
Instinct is derived from the Latin 'instinctus' (meaning to incite or urge) which comes from 'in-' (meaning into) and 'stinguere' (meaning to prick or incite). The word refers to an innate impulse or urge that drives behavior.
Think of an inner 'urge' ('instinctus') that 'pricks' you to act in a certain way — that's what instinct means.