To put "in ward" was to place under guard, or in confinement, Genesis 40:3; Le 24:12. Ward also seems to mean a guard-room, Nehemiah 12:25; Isaiah 21:8, and the guards themselves, Acts 12:10, or any small band, 1 Chronicles 25:8; 26:16.

4929. mishmar -- place of confinement, jail, prison, guard, watch ...
... 1). diligence, guard, office, prison, ward, watch. From shamar; a guard
(the man, the post or the prison); a deposit (fig.); also ...
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4931. mishmereth -- a guard, watch, charge, function
... allegiance (1), charge (27), duties (15), duty (2), guard post (2), guard* (1),
guards (2 ... charge, keep, or to be kept, office, ordinance, safeguard, ward, watch. ...
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6488. peqiduth -- oversight
... Word Origin from paqad Definition oversight NASB Word Usage guard (1). ward. From
paqiyd; supervision -- ward. see HEBREW paqiyd. << 6487, 6488. peqiduth. 6489 ...
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1004. bayith -- a house
... 1), dungeon* (2), faced inward (1), family (2), family* (1), guard* (1), hall ... contain,
hangings, home(born), (winter)house(-hold), inside(-ward), palace, place ...
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