muddy (adj.)youdaoicibaDictYouDict[muddy 词源字典]
late 13c., from mud + -y (2). Big Muddy in reference to the Missouri or Mississippi rivers is first recorded 1825.[muddy etymology, muddy origin, 英语词源]
muddy (v.)youdaoicibaDictYouDict
"to make muddy," c. 1600, from muddy (adj.). Related: Muddied; muddying.