Broach
. To broach a new subject. To start one in conversation. The allusion is to beer tubs. If one is flat, another must be tapped. A broach is a peg or pin, and to broach a cask is to bore a hole in the top for the vent-peg.
“I did broach this business to your highness.”
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Entry taken from
Dictionary of Phrase and Fable,
edited by the Rev. E. Cobham Brewer, LL.D. and revised in 1895.