or acclimatise
■ verb
1》 (often ~ to or be/become ~d to ) become accustomed to a new climate or new conditions.
2》 Biology respond to changes in environmental factors.
3》 Botany & Horticulture harden off (a plant).
Derivatives
acclimatization noun
Origin
C19: from Fr. acclimater '~' + -ize .