
Atavistic
Evolutionary Throwback
Describes behaviors or reactions that seem outdated, coming from our distant past.

His atavistic response to the threat was to run away.
Emotional Reaction
Used when someone has a gut reaction that's mostly emotional, not based on modern logic.

She had an atavistic fear of the storm, like ancient humans might have.
Subconscious Drives
Involves instinctual urges or drives we are not consciously aware of.

There's an atavistic drive in humans to gather and hoard resources.
Compare with
AncestorAntiquatedArchaicNeanderthalPrimitiveRegressiveRetrogradeThrowback
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