rabbet (n.)youdaoicibaDictYouDict[rabbet 词源字典]
"rectangular groove cut out of the edge of a piece of wood or stone so that it may join by lapping with others," late 14c., from Old French rabat "a recess in a wall, a lower section," literally "a beating down," a back-formation from rabattre "to beat down, beat back" (see rebate (v.)). The verb is attested from mid-15c. (implied in rabetynge).[rabbet etymology, rabbet origin, 英语词源]
inosculateyoudaoicibaDictYouDict
"Join by intertwining or fitting closely together", Late 17th century: from in-2 'into' + Latin osculare 'provide with a mouth or outlet' (from osculum, diminutive of os 'mouth'), on the pattern of Greek anastomoun, in the same sense.