- rip-rap (n.)
[rip-rap 词源字典]
- also riprap, "loose stone thrown down in water or soft ground as foundation," 1822, American English, perhaps connected with earlier nautical word rip-rap meaning "stretch of rippling water" (often caused by underwater elevations), 1660s, probably of imitative origin (compare riprap "a sharp blow," 1570s).[rip-rap etymology, rip-rap origin, 英语词源]