proofed
adjective
[ pru:ft ]
• (of fabric) made waterproof.
• "the flysheet is made from proofed nylon"
proof
verb
• make (fabric) waterproof.
• "if you are using a piece of lightweight canvas it will be necessary to proof the fabric when complete"
• make a proof of (a printed work, engraving, etc.).
• "proof each plate and print it on acetate first"
• activate (yeast) by the addition of liquid.
• "proof the yeast with the teaspoon of sugar"
Origin:
Middle English preve, from Old French proeve, from late Latin proba, from Latin probare ‘to test, prove’. The change of vowel in late Middle English was due to the influence of prove. Current senses of the verb date from the late 19th century.
