picnic: [18] Picnic was borrowed from French piquenique, a word which seems to have originated around the end of the 17th century. It is not clear where it came from, but one theory is that it was based on the verb piquer ‘pick, peck’ (source of English pick), with the rhyming nique perhaps added in half reminiscence of the obsolete nique ‘trifle’. Originally the word denoted a sort of party to which everyone brought along some food; the notion of an ‘outdoor meal’ did not emerge until the 19th century. [picnic etymology, picnic origin, 英语词源]