astringent (adj.)youdaoicibaDictYouDict[astringent 词源字典]
1540s, from Latin astringentum (nominative astringens), present participle of astringere "to bind fast, tighten, contract," from ad- "to" (see ad-) + stringere "draw tight" (see strain (v.)). As a noun from 1620s.[astringent etymology, astringent origin, 英语词源]