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in the PONS Dictionary

I. proof [pru:f] N

1. proof LAW, mat (facts establishing truth):

2. proof no pl (test):

3. proof typo, phot (trial impression):

II. proof [pru:f] ADJ

1. proof (impervious):

2. proof (degree of strength):

III. proof [pru:f] VB trans

galley-proof N typo

tamper-proof [ˈtæmpəɐ pru:f, Am -pɚ-], tamper-resistant ADJ

Present
Iproof
youproof
he/she/itproofs
weproof
youproof
theyproof
Past
Iproofed
youproofed
he/she/itproofed
weproofed
youproofed
theyproofed
Present Perfect
Ihaveproofed
youhaveproofed
he/she/ithasproofed
wehaveproofed
youhaveproofed
theyhaveproofed
Past Perfect
Ihadproofed
youhadproofed
he/she/ithadproofed
wehadproofed
youhadproofed
theyhadproofed