And a slinger is someone who has a leather pouch with two long cords attached to it, and they put a projectile, either a rock or a lead ball, inside the pouch, and they whirl it around like this and they let one of the cords go, and the effect is to send the projectile forward towards its target.
Pengumban adalah orang yang punya kantung kulit yang dipasangi dua tali panjang, dan mereka menaruh proyektil, entah batu atau bola timbal, di dalam kantung itu, lalu mereka memutarnya begini dan melepaskan salah satu tali, akibatnya proyektil terlontar ke depan menuju sasaran.