palpable: [14] Latin palpāre meant ‘touch, stroke’ (it may be related to English feel). From it in post-classical times was derived the adjective palpābilis ‘touchable’ – whence English palpable. Other derivatives were the verb palpitāre ‘tremble, throb’ (from which English gets palpitate [17]) and the noun palpus ‘touching’ (source of English palp [19]). => palpitate[palpable etymology, palpable origin, 英语词源]