hassock (n.)youdaoicibaDictYouDict[hassock 词源字典]
Old English hassuc "clump of grass, coarse grass," of unknown origin. Sense of "thick cushion" is first recorded 1510s, with the likely connection being the perceived similarity of a kneeling cushion and a tuft of grass. Related: Hassocky.[hassock etymology, hassock origin, 英语词源]