Meaning

noun a fishing net with three layers; the outer two are coarse mesh and the loose inner layer is fine mesh

noun an adjustable pothook set in a fireplace

noun a restraint that is used to teach a horse to amble

originFrom Middle English trameyle, from Old French tramail (“net for catching fish”), from Late Latin tremaculum, from tri- (“tri-”) + macula (“spot, speck; mesh, cell”). Cognate with Italian tramaglio (“trammel”), Spanish trasmallo (“drift net”).

Etymology from Wiktionary, CC BY-SA 3.0