acclimatize

To get used to a new climate, or to a new situation.

acclimatize to the new regulations

It takes time to acclimatize to the thin air of high mountains.

To make used to a new climate or one that is different from that which is natural; to inure or habituate to other circumstances; to adapt to the peculiarities of a foreign or strange climate.

acclimatize the staff to the new regulations