potlatch (n.)youdaoicibaDictYouDict[potlatch 词源字典]
1845, "a gift," from Chinook jargon pot-latch, "a gift," from Nootka (Wakashan) patshatl "giving, gift." Later (1865) in sense "ceremony in which gifts are exchanged."[potlatch etymology, potlatch origin, 英语词源]