/ ˈhæmək; NAmE / noun
a type of bed made from a net or from a piece of strong material, with ropes at each end that are used to hang it between two trees, posts, etc.
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WORD ORIGIN
mid 16th cent. (in the Spanish form hamaca ): via Spanish from Taino hamaka ; the ending was altered in the 16th cent. by association with -ock .