"Filibuster" was originally used to describe an unauthorized military adventurer, specifically "an American engaged in ...

A recent study by Dr. Alar Läänelaid and his colleagues has provided new insights into the creation of the oldest dated ...

specifically "an American engaged in fomenting insurrections in Latin America in the mid-19th century," according to Merriam-Webster. It comes directly from the Spanish word "filibustero," which ...