\Roust\ (roust), v. t.
To rouse; to disturb; as, to roust one out. [Prov. Eng. &
Local, U.S.]

\Roust\, n. [Cf. Icel. r["o]st an estuary.]
A strong tide or current, especially in a narrow channel.
[Written also {rost}, and {roost}.] --Jamieson.