Cause (a liquid) to enter by penetrating the interstices.

Roget 41: mix; join etc. 43; combine etc. 48; commix, immix^†, intermix; mix up with, mingle; commingle, intermingle, bemingle^†; shuffle etc. (derange) 61; pound together; hash up, stir up; knead, brew; impregnate with; interlard etc. (interpolate) 228; intertwine, interweave etc. 219; associate with; miscegenate^†.    be mixed &c.; get among, be entangled with.    instill, imbue; infuse, suffuse, transfuse; infiltrate, dash, tinge, tincture, season, sprinkle, besprinkle, attemper^†, medicate, blend, cross; alloy, amalgamate, compound, adulterate, sophisticate, infect.    ... show more

Roget 228: lie between, come between, get between; intervene, slide in, interpenetrate, permeate.    put between, introduce, import, throw in, wedge in, edge in, jam in, worm in, foist in, run in, plow in, work in; interpose, interject, intercalate, interpolate, interline, interleave, intersperse, interweave, interlard, interdigitate, sandwich in, fit in, squeeze in; let in, dovetail, splice, mortise; insinuate, smuggle; infiltrate, ingrain.    interfere, put in an oar, thrust one's nose in; intrude, obtrude; have a finger in the pie; introduce the thin end of the wedge; thrust in etc. (insert) 300.    ... show more

Roget 339: moisten, wet; humect^†, humectate^†; sponge, damp, bedew; imbue, imbrue, infiltrate, saturate; soak, drench etc. (water) 337.    be moist etc. adj.; not have a dry thread; perspire etc. (exude) 295.    ... show more

Roget 537: teach, instruct, educate, edify, school, tutor; cram, prime, coach; enlighten etc. (inform) 527.    inculcate, indoctrinate, inoculate, infuse, instill, infix, ingraft^†, infiltrate; imbue, impregnate, implant; graft, sow the seeds of, disseminate.    given an idea of; put up to, put in the way of; set right.    sharpen the wits, enlarge the mind; give new ideas, open the eyes, bring forward, teach the young idea how to shoot" [Thomson]; improve etc. 658.    expound etc. (interpret) 522; lecture; read a lesson, give a lesson, give a lecture, give a sermon, give a discourse; incept^†; hold forth, preach; sermonize, moralize; point a moral.    train, discipline; bring up, bring up to; form, ground, prepare, qualify; drill, exercise, practice, habituate, familiarize with, nurture, drynurse^†, breed, rear, take in hand; break, break in; tame; preinstruct^†; initiate; inure etc. (habituate) 613.    put to nurse, send to school.    direct, guide; direct attention to etc. (attention) 457; impress upon the mind, impress upon the memory; beat into, beat into the head; convince etc. (belief) 484.    [instructional materials] book, workbook, exercise book.    [unnecessary teaching] preach to the wise, teach one's grandmother to suck eggs, teach granny to suck eggs; preach to the converted.    ... show more

Enter a group or organization in order to spy on the members:
— The student organization was infiltrated by a traitor.

synonym: penetrate.

Roget 294: have the entree; enter; go into, go in, come into, come in, pour into, pour in, flow into, flow in, creep into, creep in, slip into, slip in, pop into, pop in, break into, break in, burst into, burst in; set foot on; ingress; burst in upon, break in upon; invade, intrude; insinuate itself; interpenetrate, penetrate; infiltrate; find one's way into, wriggle into, worm oneself into.    give entrance to etc. (receive) 296; insert etc. 300.    ... show more

Pass into or through by filtering or permeating.

Pass through an enemy line; in a military conflict.

synonym: pass through.