the.com/acclimation

Your body's way of saying fine, I'll adjust, but you owe me a week.

means The process of gradually adjusting to a new climate, altitude, or environment.

from Built from acclimate, which fuses the Latin prefix ad- ('to, toward') with climate — itself from Greek klima, meaning 'slope' or 'inclination,' originally referring to the slant of the earth's surface relative to the sun's rays. The ancient Greeks used klima to describe geographic zones defined by this tilt, and the sense evolved into 'region with particular weather,' then 'weather itself.' So acclimation is literally about bending yourself toward a new slope of the world.

heat version
takes 7 to 14 days, not instant
altitude version
more red blood cells, slowly, grudgingly
vs acclimatization
lab-controlled change versus real-world natural change
reversible
lose it in weeks without repeated exposure
the.com · every word