impervious to correction by punishment

impervious to pleas, persuasion, requests, reason

not admitting of passage or capable of being affected

Made of or coated or treated with rubber, plastic, or a sealing agent to prevent penetration by water, Proof against penetration or permeation by water; impervious to water, Made of or covered with material that doesn't allow water in, verb_ To make waterproof or water-resistant, make watertight, transitive verb_ To make impervious to water, To render impervious to water, as cloth, leather, etc, noun_ a water-resistant coat, Cloth made waterproof, or any article made of such cloth, or of other waterproof material, as rubber; esp., an outer garment made of such material, Any material which repels water; especially, a light woolen cloth made for the purpose, and subjected to some waterproofing application

To convert (an animal hide) into leather by subjecting it to a chemical process that stabilizes the proteins, making it less susceptible to decay, To make (a person or a person's skin) darker by exposure to the sun, To get or become tanned, transitive verb_ To make brown; to imbrown, as by exposure to the rays of the sun, To convert (the skin of an animal) into leather, as by usual process of steeping it in an infusion of oak or some other bark, whereby it is impregnated with tannin, or tannic acid (which exists in several species of bark), and is thus rendered firm, durable, and in some degree impervious to water, colloq. To thrash or beat; to flog; to switch, adjective_ Light or moderate yellowish-brown to brownish-orange, Having a suntan, Used in or relating to tanning, noun_ The bark of the oak, willow, chestnut, larch, hemlock, spruce, and other trees abounding in tannin, bruised and broken by a mill, and used for tanning hides, An embrowning of the skin by exposure to the sun, A brown color imparted to the skin by exposure to the sun

The validation of a proposition by application of specified rules, as of induction or deduction, to assumptions, axioms, and sequentially derived conclusions, The presentation of sufficient evidence_ as, the burden of proof lies with the plaintiff, The state of having been tested and approved; firmness, hardness, or impenetrability_ specifically applied to arms or armor of defense, to note that they have been duly tested and are impenetrable, intransitive verb_ To work (dough) into proper lightness, To make a trial impression of (printed or engraved matter), To become properly light for cooking, adjective_ Used to proofread or correct typeset copy, Of standard alcoholic strength, Fully or successfully resistant; impervious. Often used in combination