英语词源字典 - 在线词源网站

engaging (adj.)[engaging 词源字典]: "interesting, winning, attractive," 1670s, present participle adjective from engage. Related: Engagingly.[engaging etymology, engaging origin, 英语词源]
messaging (n.): 1865, verbal noun from message (v.).
staging (n.): "temporary structure or support," early 14c., verbal noun from stage (v.). As an adjective to designate "stopping place or assembly point," 1945.