What does abroach mean?
The definition of abroach
A*broach”, v. t.
Etym: [OE. abrochen, OF. abrochier. See Broach.]

To set abroach; to let out, as liquor; to broach; to tap. [Obs.] Chaucer.

A*broach”, adv.
Etym: [Pref. a- + broach.]

1 Broached; in a condition for letting out or yielding liquor, as a cask which is tapped. Hogsheads of ale were set abroach. Sir W. Scott.
2 Hence: In a state to be diffused or propagated; afoot; astir. “Mischiefs that I set abroach.” Shak.