We took turns keeping watch at night.
A guard was standing at the entrance.
He was keeping watch at the entrance.
The soldiers took turns standing watch.
The company posted a guard in front of the warehouse.
I asked a friend to keep watch for me.
警備 emphasizes organized security work (e.g., by guards or police), while 見張り is a broader, less institutional term for keeping watch.
見張り refers to standing lookout or keeping watch in a general sense, while ウォッチ in its nautical sense specifically denotes a scheduled duty shift aboard a ship.
見張り is the common word for standing watch or keeping lookout, while 番 in this sense is a slightly more general term for guard duty.
Used to count people serving as lookouts or guards (見張り役).
Standard kanji spelling for the noun meaning watch, guard, or lookout.
Kana spelling is sometimes used in informal writing or when the kanji is not needed.
Compound of 見 (mi, 'seeing') + 張り (hari, 'stretching, tension'), from the verb 見張る (miharu, 'to watch, to keep an eye on').