Merriam-Webster Collegiate Dictionary - broach

 I. noun  Etymology: Middle English broche, from Anglo-French, from Vulgar Latin *brocca, from Latin, feminine of broccus projecting  Date: 13th century  1. brooch  2. any of various pointed or tapered tools, implements, or parts: as  a. a spit for roasting meat  b. a tool for tapping casks  c. a cutting tool for removing material from metal or plastic to shape an outside surface or a hole  II. verb  Date: 15th century  transitive verb  1.  a. to pierce (as a cask) in order to draw the contents; also to open for the first time  b. to open up or break into (as a mine or stores)  2. to shape or enlarge (a hole) with a ~  3.  a. to make known for the first time  b. to open up (a subject) for discussion  intransitive verb to break the surface from below  Synonyms: see express  • ~er noun  III. intransitive verb  Etymology: perhaps from 2~  Date: 1705 to veer or yaw dangerously so as to lie broadside to the waves — often used with to