encumbrance (n.)youdaoicibaDictYouDict[encumbrance 词源字典]
c. 1300, "trouble, difficulty; ensnarement, temptation," from Old French encombrance "encumbrance, obstruction; calamity, trouble," from encombrer (see encumber). Meaning "that which encumbers, impediment, obstacle" is from late 14c. in English.[encumbrance etymology, encumbrance origin, 英语词源]