Inhibit
Inhibit : Prevent, stop, restrain or arrest an undesirable action, i.e., prevent corrosion. (WT) INHIBITED DRILLING FLUID: A drilling fluid having an aqueous phase with a chemical composition that tends to retard and even prevent (inhibit) appreciable hydration (swelling) or dispersion of formation clays and shales through chemical and/or physical means. See: Inhibitor Drilling Fluid. (Bul 10C)