1254, from O.Fr.
pirate, from L.
pirata "sailor, sea robber," from Gk.
peirates "brigand, pirate," lit. "one who attacks," from
peiran "to attack, make a hostile attempt on, try," from
peira "trial, an attempt, attack," from PIE base
*per- "try" (cf. L.
peritus "experienced,"
periculum "trial, experiment, risk, danger," see
peril). Meaning "one who takes another's work without permission" first recorded 1701; sense of "unlicensed radio broadcaster" is from 1913. The verb is first recorded 1574.