The Collaborative International Dictionary of English v.0.48:

Imbrue \Im*brue"\, v. t. [imp. & p. p. Imbureed; p. pr. & vb.
   n. Imbureing.] [Cf. OF. embruer, also embruver, embreuver,
   embrever, to give to drink, soak (see pref. En-, 1, 1st
   In-, and Breverage), but also OE. enbrewen, enbrowen, to
   stain, soil (cf. Brewis).]
   To wet or moisten; to soak; to drench, especially in blood.
   [1913 Webster]

         While Darwen stream, will blood of Scots imbrued.
                                                  --Milton.
   [1913 Webster]