RobH_en_tn/pro/27/22.md

Even if you crush a fool ... yet his foolishness will not leave him

This means that even if a fool is made to suffer hardship or pain (being crushed is often a metaphor for suffering in Hebrew), he will remain foolish. (See: rc://en/ta/man/translate/figs-metaphor)

pestle

a hard tool with a rounded end, used for crushing things in a bowl (See: rc://en/ta/man/translate/translate-unknown)