bracket (v.)youdaoicibaDictYouDict[bracket 词源字典]
1797, of printed matter, "to enclose in brackets," from bracket (n.). Also, "to couple or connect with a brace" (1827), also figurative, "to couple one thing with another" in writing (1807). Artillery rangefinding sense is from 1903, from the noun (1891) in the specialized sense "distance between the ranges of two shells, one under and one over the object." Related: Bracketed; bracketing. In home-building and joinery, bracketed is attested by 1801.[bracket etymology, bracket origin, 英语词源]
joiner (n.)youdaoicibaDictYouDict
early 14c. (late 12c. as a surname), joynour "maker of furniture, small boxes, etc.," from Old French joigneor "joiner, carpenter," agent noun from joindre "to join" (see join). A craftsman who did lighter and more ornamental work than a carpenter. Meaning "one who makes a habit of joining" (societies, clubs, etc.) is from 1890. Related: Joinery.