naturalise

verb6

1. •
   To grant citizenship to someone not born a citizen.
2. •
   To acclimatize an animal or plant.

   • Its wearer suggested that pears and peaches might yet be naturalized in the New England climate. — 1850
3. •
   To make (a word) a natural part of the language, using the native homologue of each phoneme (and often for each morpheme) of the imported word (e.g., native inflections).

   • In English, foreign words are typically written in italics until they are naturalized.
   • English speakers have naturalized the French word "café".
4. •
   To make natural.

   • Custom naturalizes labour or study.
5. •
   To limit explanations of a phenomenon to naturalistic ones and exclude supernatural ones.
6. •
   To study nature.

   • Well, any way, Doctor, we will make an appointment for a whole day here next spring ; we will botanize, herbarize and naturalize to our hearts' content, from morn till night." — 1854