1. (v. t.) To enter into; to make way into the interior of; as, light penetrates darkness\.

2. (v. t.) To affect profoundly through the senses or feelings; to touch with feeling; to make sensible; to move deeply; as, to penetrate one's heart with pity.

3. (v. t.) To pierce into by the mind; to arrive at the inner contents or meaning of, as of a mysterious or difficult subject; to comprehend; to understand.

4. (v. i.) To pass; to make way; to pierce. Also used figuratively.

affect auger be glimpsed be hep to be on to be realized be remembered be wise to benumb bespread besprinkle bite bore breathe brew broach catch on to charge chill color come across come alive come home to come in come through comprehend countersink crawl with creep with cut dawn on decoct descry diffuse dig discern discover dredge drill drive dye ease in empierce encroach enter entincture extend throughout fathom figure out fill find out fix flavor freeze frost frostbite gain entree get get across get at get into get over get through get to go deep go in go into go through go through one gore gouge gouge out grasp hit hole honeycomb imbrue imbue impale impregnate infiltrate infuse ingress inject inoculate insert insinuate instill interject interpenetrate interpolate introduce intromit invade jab knife lance leave no void leaven make an entrance make an impression make out make way into melt melt the heart move needle never be forgotten nip numb obsess occupy overrun overspread overswarm pass through perceive percolate perforate perfuse permeate pervade pierce pink plumb pop in prick probe punch puncture put in rankle reach ream ream out refrigerate register riddle run through saturate season see see daylight see into see the light see through seep in sense set in sink in skewer slip in smart soak in soften spear spike spit stab steep stick stick in sting stir strike suffuse swarm with tap teem with temper throw in tincture tinge touch touch a chord transfix transfuse transpierce trepan trephine trespass tuck in tumble to uncover understand unravel whip in wise up to work out