From H2168 (zamar, 'to prune/trim'). Mazmereth is an agricultural tool β the curved blade used to prune vines and remove dead growth to promote fruitfulness. It appears in the famous eschatological passage about swords being beaten into plowshares.
Isaiah 2:4 and Micah 4:3 contain one of Scripture's most beloved visions of peace: nations will 'beat their swords into plowshares, and their spears into mazmeroth.' The pruning hook represents the peaceful, fruitful kingdom β warfare instruments repurposed for cultivation. Interestingly, Joel 3:10 reverses this ('Beat your plowshares into swords') for the day of battle β but the final word is always Isaiah's peace. Jesus employed the vineyard and pruning imagery in John 15: the Father is the vinedresser who prunes branches that they may bear more fruit. The mazmereth is an instrument of purposeful discipline for greater fruitfulness.