mermanWiktionary 原文构词拆分mer-前缀sea; marine; applied to beings that are fully or partly sea-creatures.+man词根/词干演变路径（由近及远）英语继承自 ←中古英语 mereman继承自 ←古英语 *meremann “merman”词源说明From Middle English mereman, from Old English *meremann (“merman”) (suggested by Old English meremenn, meremennen, meremenin (“mermaid, siren”)), equivalent to mer- + man. Cognate with Dutch meerman (“merman”), German Meermann (“merman”).释义（英文）名词 NounA legendary creature, human male from the waist up, fishlike from the waist down.