onboardWiktionary 原文构词拆分on词根/词干+board词根/词干也可拆分为on-前缀on, at, toward, upon.+board词根/词干词源说明on + board, from on board (“phrase”), equivalent to on- + board.释义（英文）形容词 AdjectiveCarried or used on or in a vehicle or vessel.(by extension, figurative) Being a part of, being included in, participating in.副词 AdverbOn or in a vehicle or vessel; aboard; on board.动词 Verb(figurative) To become a part of a group; (transitive) to incorporate