approof

noun2

1. •
   (no longer used) approval; commendation

   • O perilous mouths, / That bear in them one and the selfsame tongue, / Either of condemnation or approof, — 1603
2. •
   (no longer used) trial; proof; testimony; affirmation.

   • A man so absolute in my approof, / That nature hath reserv'd small dignity, / That he enjoys not. — 1600