slogan: [16] Slogan is a Gaelic contribution to English. It comes from sluaghghairm ‘war-cry’, a compound formed from sluagh ‘army’ and ghairm ‘shout’. English at first used it in its original Gaelic sense, and the metaphorical ‘catchphrase’ did not emerge until the 18th century. [slogan etymology, slogan origin, 英语词源]