The Collaborative International Dictionary of English v.0.48:

Ingulf \In*gulf"\, v. t. [imp. & p. p. Ingulfed; p. pr. & vb.
   n. Ingulfing.] [Cf. Engulf.] [Written also engulf.]
   To swallow up or overwhelm in, or as in, a gulf; to cast into
   a gulf. See Engulf.
   [1913 Webster]

         A river large . . .
         Passed underneath ingulfed.              --Milton.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Engulf \En*gulf"\, v. t. [imp. & p. p. Engulfed; p. pr. & vb.
   n. Engulfing.] [Pref. en- + gulf: cf. OF. engolfer. Cf.
   Ingulf.]
   To absorb or swallow up as in a gulf.
   [1913 Webster]

         It quite engulfs all human thought.      --Young.

   Syn: See Absorb.
        [1913 Webster]

WordNet (r) 3.0 (2006):

engulf
    v 1: devote (oneself) fully to; "He immersed himself into his
         studies" [syn: steep, immerse, engulf, plunge,
         engross, absorb, soak up]
    2: flow over or cover completely; "The bright light engulfed him
       completely"