Present participle of begulf; swallowing, engulfing, or completely surrounding something.
From be- + gulf + -ing. See begulfed for etymology of the base word.
Participles like this show English's flexibility—the -ing form can function as a noun ('the begulfing of the ship'), an adjective ('the begulfing wave'), or part of a continuous verb tense ('the wave is begulfing the shore').
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