steward: [OE] A steward is etymologically someone ‘in charge of a sty’. Its Old English ancestor stigweard was a compound formed from stig ‘hall, house’ (a relative, if not the direct ancestor, of English sty ‘dwelling for pigs’) and weard ‘guardian, keeper’ – hence ‘keeper of the hall’. => guard, sty, ward[steward etymology, steward origin, 英语词源]