Meaning

noun a small natural hill

noun a hanging bed of canvas or rope netting (usually suspended between two trees); swings easily

originBorrowed from Spanish hamaca, from Taíno *hamaka (compare Lokono hamaka, Wayuu jama'a), from Proto-Arawak *hamaka. Columbus, in the narrative of his first voyage, says: “A great many Indians in canoes came to the ship to-day for the purpose of bartering their cotton, and hamacas, or nets, in which they sleep.”

Etymology from Wiktionary, CC BY-SA 3.0