acid
acid-proof enamel

burden
burden of proof

damp-proof
damp-proof course

dust-proof
à prova de poeiras

explosion
explosion proof

foundry
foundry proof

friction-proof
antifricção

frost
frost proof

galley
galley proof

home
home proof

incapable
incapable of proof

negative
negative proof

page
page proof

positive
positive proof

press
press proof

proof
as a proof of

proof-correct
corrigir em prova

proof-correcting
correção de provas

puncture-proof
antifuro

re-proof
reimpermeabilizar

short-circuit
short-circuit proof

spoon
spoon proof

supply
to supply proof

sure
sure proof

susceptible
...susceptible of proof

tangible
tangible proof

ultimate
ultimate proof

witness
the proof witnesses