- roundhouse (n.)
[roundhouse 词源字典]
- also round-house, "lock-up, place of detention," 1580s, from Dutch rondhuis "guardhouse." Meaning "circular shed for locomotives with a turntable in the center" is from 1856. Meaning "blow delivered with a wide sweep of the arm" is perhaps extended from "round building for circular machinery."[roundhouse etymology, roundhouse origin, 英语词源]