thicket (n.)youdaoicibaDictYouDict[thicket 词源字典]
"close-set growth of shrubs, bushes, trees, etc.," late Old English þiccet, from þicce (see thick) + denominative suffix -et. Absent in Middle English, reappearing early 16c., perhaps a dialectal survival or a re-formation.[thicket etymology, thicket origin, 英语词源]