kontinento

A geographical word with a nice picture inside it: continens terra was the land that keeps going, the mainland, in contrast to the islands. English kept the same contrast when it spoke of the Continent and meant "not this island".

The seam that is not there is -ent-. Esperanto has no such suffix, so there is nothing to strip, and kontin- is not a root. Compare the genuine article: -ant-, -int-, -ont- are the active participle suffixes and they really do come apart, as in parolanta speaking. An -ent- sitting at the end of an international word is a Latin present participle that was already frozen when the word was borrowed, and it does the same nothing in prezidento and momento.

For the useful vocabulary around it: insulo island, maro sea, oceano ocean, lando country. Continent names are proper nouns and keep their capitals - Eŭropo, Afriko, Azio - and the adjectives are formed as you would expect, eŭropa, afrika.