instinctive
adj.describing a feeling or action that you do naturally without having to think about it first.
adj.relating to or prompted by an innate, typically fixed pattern of behaviour in response to certain stimuli; arising from impulse rather than conscious thought.
“Her reaction to the loud noise was instinctive.”
“The experienced pilot made an instinctive correction to the controls as soon as the plane hit the turbulence.”
“While some social behaviours are learned through observation, the protective bond between a parent and a newborn is often described as an instinctive drive that transcends cultural boundaries.”
Often used predicatively after linking verbs like 'be', 'feel', or 'seem', or attributively before a noun.
Learners sometimes confuse the adjective 'instinctive' with the adverb 'instinctively' or the noun 'instinct' when modifying a noun.
“AI doesn't have the same instinctive moral guardrails as humans.”
From instinct + -ive.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.