campaign (n.)youdaoicibaDictYouDict[campaign 词源字典]
1640s, "operation of an army in the field," during a single season, in a particular region, or in a definite enterprise; from French campagne "campaign," literally "open country," from Old French champagne "countryside, open country" (suited to military maneuvers), from Late Latin campania "level country" (source of Italian campagna, Spanish campaña, Portuguese campanha), from Latin campus "a field" (see campus). Old armies spent winters in quarters and took to the "open field" to seek battle in summer. Extension of meaning to "political activity before an election, marked by organized action in influencing the voters" [DAE] is American English, 1809.[campaign etymology, campaign origin, 英语词源]
winter (n.)youdaoicibaDictYouDict
Old English winter (plural wintru), "the fourth and coldest season of the year, winter," from Proto-Germanic *wintruz "winter" (cognates: Old Frisian, Dutch winter, Old Saxon, Old High German wintar, German winter, Danish and Swedish vinter, Gothic wintrus, Old Norse vetr "winter"), probably literally "the wet season," from PIE *wend-, from root *wed- (1) "water, wet" (see water (n.1)). On another old guess, cognate with Gaulish vindo-, Old Irish find "white."

As an adjective in Old English. The Anglo-Saxons counted years in "winters," as in Old English ænetre "one-year-old;" and wintercearig, which might mean either "winter-sad" or "sad with years." Old Norse Vetrardag, first day of winter, was the Saturday that fell between Oct. 10 and 16.