Sakkîyn (שַׂכִּין) means knife, blade — a cutting instrument. A hapax legomenon (appearing once in the Hebrew Bible), possibly related to Aramaic cognates.
Proverbs 23:2: 'Put a knife to your throat if you are given to gluttony.' The image is vivid — self-mastery so radical it is like restraining yourself at knifepoint. The broader context warns against being deceived by a ruler's delicacies. Self-control is a core spiritual discipline, especially regarding appetite. This connects to Galatians 5:24: 'those who belong to Christ have crucified the flesh with its passions and desires.' The knife symbolizes intentional, even violent resistance to ungodly impulses.