(n.) The act or process of percolating, or filtering; filtration; straining. Specifically (Pharm.), the process of exhausting the virtues of a powdered drug by letting a liquid filter slowly through it.

absorbency absorbent absorption access admission adsorbent adsorption assimilation blotter blotting blotting paper bolting brewing chemisorption chemosorption clarification colature colliquation condensation decoagulation deliquescence deliquium destructive distillation digestion dissolution dissolving distillation drench drenching dribble drip dripping drop ducking dunking edulcoration effusion elution elutriation endosmosis engrossment entrance entree entry essentialization excretion exfiltration exosmosis extraction extravasation exudation filtering filtration fluidification fluidization fusing fusion imbruement imbuement import importation importing impregnation income incoming infiltration infusion ingoing ingress ingression injection input insertion insinuation intake interpenetration introduction introgression intrusion leaching leakage liquefaction liquescence liquescency lixiviation maceration melting ooze oozing osmosis penetration percolating permeation pulping purification reception refinement riddling running saturation screening seep seepage seeping seething separation sieving sifting soak soakage soaking solubilization solution sopping sorption souse sousing spiritualization sponge sponging spurtle steeping straining sublimation sweating thawing transudation trickle tricklet unclotting weep weeping winnowing