(ˈ)tär|kwinēən adjective
Usage: usually capitalized
Etymology: Latin tarquini us (from Tarquinius Tarquin, any one of a succession of legendary Roman kings of the 6th and 5th centuries B.C., probably from Tarquinii Tarquinia, ancient Roman town in central Italy that was the birthplace of the first Tarquin king) + English -an
: of or relating to the legendary Tarquin kings of ancient Rome noted especially for their tyranny