Source : Webster's Revised Unabridged Dictionary (1913)

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}.

         A river large . . . Passed underneath ingulfed.
                                                  --Milton.