noun / verb

guard

GARD/ɡɑːrd/

An agent assigned to protect against harm or interference.

A museum guard watches the doorway to keep valuable objects safe.

A uniformed museum guard attentively protecting a doorway with valuable objects safely beyond, respectful modern security role, no wording.

Etymology

French garde named both a keeper and the care involved in keeping watch. This connection between watchful care and protection underlies guard for a person or device that keeps something safe.

In context

U.S. Consumer Product Safety Commission7:47

Also, there are important safety devices, including the blade guard, splitter or spreader and anti-kickback device.

Briefing Matter: Table Saws-Notice of Proposed Rulemaking

More examples

Two officers guard the entrance throughout the night.
The saw has a guard that covers its blade.
The left guard blocks a defender to protect the quarterback.

Forms

guard · guards · guarded · guarding

guardian noun — Someone responsible for protecting or caring for another.

Similar words

sentry: Specifically someone stationed at a post to keep watch.
protector: Emphasizes preventing harm rather than watching or controlling access.
shield: Emphasizes a barrier that blocks blows or other dangers.