English

exclave

From ex- + (en)clave.

Formed from ex- + enclave

Proto-Indo-European *eǵ-

Latin ex ‘out of, from’

English ex-

Proto-Indo-European *kleh₂u- ‘nail, pin, hook - instruments, of old use for…’

…

Vulgar Latin *inclāvāre ‘to lock in’

Old French enclaver ‘to inclose, lock in’

Middle French enclave

French enclave

Today it means

noun A portion of a country's territory not connected to the main part.

Language periods are conventional ranges, not dates for this word.