Proof

any factual evidence that helps to establish the truth of something

a formal series of statements showing that if one thing is true something else necessarily follows from it

a measure of alcoholic strength expressed as an integer twice the percentage of alcohol present (by volume)

(printing) an impression made to check for errors

a trial photographic print from a negative

the act of validating

make or take a proof of, such as a photographic negative, an etching, or typeset

knead to reach proper lightness

read for errors

activate by mixing with water and sometimes sugar or milk

make resistant (to harm)

(used in combination or as a suffix) able to withstand