déclimater

An extremely rare, largely obsolete verb meaning to remove a person, animal, or plant from the influence of its native climate — essentially the opposite of the far more common acclimater. Modern dictionaries barely register it, and a French speaker today is unlikely to ever use or recognize it.

• L'auteur emploie déclimater dans un sens presque philosophique, pour désigner un déracinement. — The author uses "déclimater" in an almost philosophical sense, to describe a kind of uprooting.
• Ce mot vieilli, déclimater, s'oppose logiquement à acclimater. — This dated word, "déclimater," is the logical opposite of "acclimater."
• On ne rencontre déclimater que dans de très anciens textes. — "Déclimater" is found only in very old texts.

So rare that most native speakers have never heard it — don't use it in ordinary conversation, where désorienté or déraciné (uprooted, disoriented) would be the natural, understood choice.

Often confused with acclimater.