forswallow means to swallow up; devour utterly; engulf. Lexicurio rates it Sui generis — a strength score of 85 out of 100.
Why “forswallow” is a great word
FORSWALLOW — [Verb] To swallow up, devour utterly, or engulf. From Middle English forswolȝen, from Old English forswelgan, forswilgan ("to swallow up, devour"), itself from the Proto-Germanic prefix *fra- ("for-, completely") + *swelganą ("to swallow"). First attested in Old English. Unlike "consume," which suggests a gradual using up, or "engulf," which implies a surrounding flood, to forswallow is to enact a total, incorporative destruction by the primal act of ingestion. It is the sea claiming a foundered ship in one gulp of green water, the silent earth collapsing upon a mine, the peat bog accepting a body without a ripple—the quiet, terminal moment when something passes irrevocably into the world's unfeeling maw, a swallow that leaves no trace behind.
Etymology
From Middle English forswolewen, forswoluwen, forswolȝen, forswalȝen, forswelȝen, from Old English forswelgan, forswilgan (“to swallow up, devour, consume, absorb”), from Proto-Germanic *farswelganą, *fraswelganą (“to devour”), from Proto-Germanic *fra- + *swelganą (“to swallow”), equivalent to for- + swallow. Cognate with Dutch verzwelgen (“to engulf, swallow up”), Middle Low German vorswelgen (“to swallow up”), Middle High German verswelgen (“to swallow up”). More at for-, swallow.
verb
- To swallow up; devour utterly; engulf.