tcadu -tca- gismu

x₁ is a town/city of metropolitan area x₂, in political unit x₃, serving hinterland/region x₄.

Also (adjective:) x₁ is urban. See also jarbu, nurma, cecmu.

In notes:

cecmu: x₁ is a community/colony of organisms x₂.
jarbu: x₁ is a suburban area of city/metropolis x₂.
nurma: x₁ is a rural/rustic/pastoral area of x₂; x₁ is in the country.
cmatca: x₁ is a village in administrative area x₃ serving hinterland x₄ small by standard x₅.
nilxa'ugri: n₁ (number) is the population of inhabitant group g₁ in area x₂ measured on scale n₂.
raltca: x₁ is a/the capital of x₂.
tcabriju: b₁ is the city/town hall of city/town t₁
tcacpi: c₁ is a pigeon of subspecies c₂.
trutca: tc₁=tu₁ is the administrative capital (seat of government) of tu₂=tc₃ located in tc₃
beiDJIN: Beijing.
brazilias: Brasilia.
bryklyn: Brooklyn, New York: a borough of New York City, at the western tip of Long Island.
buenosaires: Buenos Aires.
cangan: Hong Kong.
canxais: Shanghai.
xonkon: Hong Kong.
xyngon: Hong Kong.