英语词源字典 - 在线词源网站

alleger (n.)[alleger 词源字典]: 1570s, agent noun from allege. The Latinate form, allegator (1680s) rarely was used, for some reason.[alleger etymology, alleger origin, 英语词源]
legerdemain (n.): early 15c., "conjuring tricks," from Middle French léger de main "quick of hand," literally "light of hand," from léger "light" in weight (from Latin levis "light;" see lever) + main "hand" (from Latin manus; see manual).