Other forms: imbrued; imbruing; imbrues
To imbrue is to stain or saturate, the way water imbrues your jeans when you walk down the street in a rainstorm.
Use this old-fashioned, literary verb when you need a fancy way to say "dampen" or "permeate." It's also frequently used in literature to specifically refer to things stained with blood: "The battle will only serve to imbrue their swords with blood." The word comes from the Old French embruer, "to moisten."