From Greek peiratēs ('one who attacks'), rooted in PIE *per- ('to try, press forward'), pirate entered Latin as a legal term for enemies of all mankind before English romanticism transformed the outlaw of the seas into an icon of freedom — and digital culture borrowed the word wholesale for copyright theft.
A person who commits robbery or criminal violence at sea, or by extension engages in unauthorized appropriation of others' property or intellectual work.
The English word 'pirate' derives from Latin 'pirata', itself borrowed from Ancient Greek 'peiratēs' (πειρατής), meaning 'one who attacks' or 'brigand at sea'. The Greek form is an agent noun built on the verb 'peiran' (πειρᾶν), 'to attempt, to attack, to try one's luck', combined with the agent suffix '-tēs'. This verb derives from the noun 'peira' (πεῖρα), 'trial, attempt, experience', which traces back to the Proto-Indo-European root *per-, meaning 'to try, to risk, to lead over, to pass through'. The
Cicero's phrase hostis humani generis — 'enemy of the human race' — coined to describe pirates in 44 BC, was deliberately resurrected by 20th-century international lawyers to define crimes against humanity and later applied to torturers and slave traders. A legal category built around Aegean sea raiders became the conceptual foundation for modern human rights law.