migr

The root migr comes from Latin migrāre, meaning "to move from one place to another, to change one's home." At its heart it describes a simple physical act: picking up your life and resettling somewhere else. Roman writers used it for people relocating, for populations shifting, and later for the seasonal travel of birds.

What makes this small family so useful is that the bare root migrate is direction-neutral — it just means "to move regions." The drama all comes from the prefixes, which tell you which way the movement goes:

- migrate = move from one region to another (no direction specified): birds migrate south, workers migrate to cities.
- im- (from in-, "in") + migrate → immigrate: move into a new country to settle.
- e- (from ex-, "out") + migrate → emigrate: move out of your home country.
- trans- ("across") + migrate → transmigrate: move across into another country — or, in religious usage, a soul moving across into another body after death.

The single most important thing about this family is the immigrate / emigrate pair, because they describe the exact same physical journey from two opposite viewpoints. A woman who leaves Poland and settles in Canada is an emigrant from Poland's perspective (she moved out) and an immigrant from Canada's perspective (she moved in) — one person, one trip, two labels. The prefix is simply choosing where the camera stands: at the door she's leaving (e- = ex- = out) or the door she's entering (im- = in- = in).

The adjective migratory ("of or relating to migration") usually shows up with animals — migratory birds, migratory patterns — describing creatures whose whole life follows a moving route. And migrant stays neutral and ongoing: a migrant worker is someone who keeps moving for work, not necessarily settling anywhere. The family is small and remarkably regular: master the prefixes and you've mastered the whole set.