1. (v. i.) To enter by penetrating the pores or interstices of a substance; to filter into or through something.

2. (v. t.) To penetrate gradually; -- sometimes used reflexively.

absorb adsorb advance against advance upon assimilate barge in bathe bear down upon besprinkle blot blot up break in break in upon breathe brew burst in butt in charge in chemisorb chemosorb color come between counterattack crash crash in crash the gates creep in crowd in cut in decoct digest douche dredge drench drink drink in drink up drive drouk dye edge in elbow in encroach engross entincture entrench filter in flank flavor flush foist foist in gas horn in imbibe imbrue imbue impinge impose impose on impose upon impregnate infringe infuse inject insinuate instill interfere interlope interpose intervene intrude invade irrupt launch an attack lave leach leak in leaven lixiviate macerate march against march upon mount an attack obtrude open an offensive osmose penetrate percolate percolate in percolate into permeate pervade press in push push in put on put upon rinse rush in saturate season seep in seethe slink in slip in slurp up smash in sneak in soak soak in soak up sodden sop sorb souse sponge squeeze in steal in steep storm in strike suffuse swill up take in take up temper throng in thrust thrust in tincture tinge transfuse trench trespass wash waterlog work in worm worm in