名詞 clevis:

1. a coupler shaped like the letter U with holes through each end so a bolt or pin can pass through the holes to complete the coupling; used to attach a drawbar to a plow or wagon or trailer etc.

clev.is

n.（名詞）
A U-shaped metal piece with holes in each end through which a pin or bolt is run, used as a fastening device.
U形鉤，馬蹄鉤：一種U形金屬片，兩端有洞，有螺絲釘穿過兩洞，用作加固裝置

來源：
From clevi
源自 clevi
[possibly of Scandinavian origin] ; akin to Old Norse klofi [cleft] * see gleubh-
[可能源于斯堪的納維亞語] ；類似于 古斯堪的納維亞語 klofi [裂縫] *參見 gleubh-