"She needed to kasher the kitchen before Passover."

"He poured boiling water over all the silverware to kasher it for Pesach.” (JPS)

"No, we're complaining to you, because you're the one casting chshad on kesheirim." (source)

"What if a woman is alone with two men — one of whom is a kasher while the other is known to be a parutz?" (source)