drench: [OE] Originally, drench meant simply ‘cause to drink’. It comes ultimately from the prehistoric Germanic verb *drangkjan, which was a causative variant of *drengkan (source of English drink) – that is to say, it denoted ‘causing someone to do the action of the verb drink’. That particular sense now survives only as a technical usage in veterinary medicine, but already by the Middle English period it had moved on metaphorically to ‘drown’ (now obsolete, and succeeded by the related drown) and ‘soak thoroughly’. => drink, drown[drench etymology, drench origin, 英语词源]