isolated (adj.)youdaoicibaDictYouDict[isolated 词源字典]
1763, from French isolé "isolated" (17c.) + English -ated (see -ate (2)). The French word is from Italian isolato, from Latin insulatus "made into an island," from insula "island." The French word was used at first in English (isole, also isole'd, c. 1750), then after isolate became an English word, isolated became its past participle.[isolated etymology, isolated origin, 英语词源]