SENTRY n.
by a sentinel. Here toils, and death, and death's half-brother, sleep, Forms terrible to view, their sentry keep. Dryden. Sentry box, a small house or box to cover a sentinel at his post, and shelter him from the weather.
SHUT v.
inclose; to confine. "The Lord shut him in." Cen. vii. 16. (b) To cover or intercept the view of; as, one point shuts in another. -- To shut off. (a) To exclude. (b) To prevent the passage of, as steam through a pipe, or water through a flume, by closing a cock, valve, or gate. -- To shut out, to preclude from enter…