a system of jurisprudence based on judicial precedents rather than statutory laws; "common law originated in the unwritten laws of England and was later applied in the United States"
make (alcohol) unfit for drinking without impairing usefulness for other purposes
modify (as a native protein) especially by heat, acid, alkali, or ultraviolet radiation so that all of the original properties are removed or diminished
add nonfissionable material to (fissionable material) so as to make unsuitable for use in an atomic bomb