broacher

noun

1. a sharp-pointed rod used to hold roasting meat; spit
2. a tapered bit on a metal-cutting machine tool that is pulled or pushed through a hole to enlarge or shape the hole
3. a device for tapping casks
4. a hole made by a broach
5. brooch

transitive verb

1. to make a hole in so as to let out liquid; tap (a cask)
2. to enlarge or shape (a hole) with a broach
3. to start a discussion of; bring up; introduce: to broach a subject