traps (n.1)youdaoicibaDictYouDict[traps 词源字典]
"expanse of dark igneous rock," 1794, from Swedish trapp (Torbern Bergman, 1766), from trappa "stair," related to Middle Low German trappe "staircase" (see trap (n.)). So called from the step-like appearance of the rock.[traps etymology, traps origin, 英语词源]
traps (n.2)youdaoicibaDictYouDict
"drums, cymbals, bells, etc.," 1925, from earlier trap drummer (1903) "street musician who plays a drum and several other instruments at once," perhaps from traps "belongings" (1813), shortened form of trappings.