Acclimatize – to accustom to a new climate or different environment; acclimate

“[Roosevelt] turned to his uncle, James Alfred Roosevelt, the Hudson River aristocrat and influential Democrat (not the father of Franklin Delano Roosevelt, who was to marry Theodore’s niece Eleanor), for advice about the sordid legislative arrangement, but James only tried to acclimatize his nephew to the prevailing practices of the day: go along to get along.”

Lion in the White House, Aida D. Donald