umbrellayoudaoicibaDictYouDict[umbrella 词源字典]
umbrella: [17] Etymologically, an umbrella is a ‘little shadow’. The word was borrowed from Italian ombrella, a diminutive form of ombra ‘shade, shadow’. This in turn went back to Latin umbra, source of English sombre, umbrage, etc. It originally denoted a ‘sunshade’, and that meaning followed it into English, but it was not long before the vagaries of the British climate saw it being applied to a ‘protector against rain’.
=> umbrage[umbrella etymology, umbrella origin, 英语词源]
vagary (n.)youdaoicibaDictYouDict
1570s, "a wandering, a roaming journey," from Italian vagare or directly from Latin vagari "to wander, stroll about, roam, be unsettled, spread abroad," from vagus "roving, wandering" (see vague). The infinitive appears to have been adopted in English as a noun and conformed to nouns in -ary, "but this can hardly be explained except as an orig. university use" [Century Dictionary]. Current meaning of "eccentric notion or conduct" (1620s) is from notion of mental wandering. Related: Vagaries.