noun. In hat-making, a process for stiffening felt hats by immersing them in a bath composed largely of shellac, with other ingredients.

noun. A step in creating yeast breads and baked goods, during which the yeast is allowed to leaven the dough.

verb. Present participle of proof.

"Regardless, proofing is should always done prior to showing whether or not one is a clicker trainer."

goofing  roofing  rustproofing  spoofing  

debriefing  driveline  half-column  harrying  jawing  

proof