- alluvium (n.)
[alluvium 词源字典]
- "matter deposited by flowing water," 1660s, from Medieval Latin alluvium, neuter of alluvius "washed against," from Latin alluere "wash against," from ad- "to, against" (see ad-) + -luere, comb. form of lavere "to wash" (see lave).[alluvium etymology, alluvium origin, 英语词源]