flexuous (adj.)youdaoicibaDictYouDict[flexuous 词源字典]
"full of bends or curves, winding, sinuous," c. 1600, from Latin flexuosus, from flexus (n.) "a bending," from flectere "to bend" (see flexible). From 1620s as "undulating."[flexuous etymology, flexuous origin, 英语词源]