acclimatize

ac|cli|ma|tize /əkl'aɪmətaɪz/ (acclimatizes acclimatizing acclimatized)
in BRIT, also use acclimatise
[VERB] V to n, V pron-refl, V
When you acclimatize or are acclimatized to a new situation, place, or climate, you become used to it. (FORMAL)
The athletes are acclimatising to the heat by staying in Monte Carlo...
This year he has left for St Louis early to acclimatise himself...
They have been travelling for two days and will need some time to acclimatise.
● acclimatization [N-UNCOUNT]
Acclimatization to higher altitudes may take several weeks.
● acclimatized [ADJ] usu v-link ADJ, oft ADJ to n
It took her a while to get acclimatized to her new surroundings...