long-standing Antonyms

founded not long ago newly launched newly instituted newly founded newly established newly created in modern times recently developed here today, gone tomorrow girllike fresh-faced newly started recently created established recently established not long ago created recently created not long ago began not long ago recently set up recently launched recently introduced recently founded recently established boylike fledgling recent childish callow budding boyish blossoming blooming babyish baby ageless advanced childlike contemporary newborn new modern immature growing green girlish fresh developing current adolescent