Meaning: せんやくn. (Kanji=仙薬) panacea, elixir, cure-all, substance which supposedly prolongs lifen. (Kanji=先役) former post, former occupant of the postn. (Kanji=先約) previous engagement, prior contractn. (Kanji=煎薬) decoction, infusion, extract acquired by boilingv. (Kanji=先約する) precontract, draft a contract ahead of time, make a covenant in advance; agree beforehand, make a pact in advance