Guard

v.resilient, kindprofessional

What it means

To watch over and protect a person, place, right, or valued resource.

Reach for it when describing active protection when the threat and responsibility are legitimate

Volunteers guard the nesting area during the busy season.

playful
keep an eye on
casual temporary supervision is sufficient
not when The phrase is too light for serious security or a legal duty of care.
everyday
protect
preventing harm is the broad purpose
not when Protect does not necessarily involve watchfulness or a defended boundary.
everyday
watch
continued observation is the main action
not when Watching can be passive and may not include any power to intervene.
professional
safeguard
policies or controls preserve something important
not when Safeguard suits systems and rights better than standing physical watch.
professional
steward
long-term responsible care matters more than immediate defense
not when Stewardship includes development and use, not merely guarding against harm.
formal
defend
an active challenge or attack must be resisted
not when Defend is more confrontational and can escalate a situation that only needs monitoring.
literary
shield
a barrier takes the force of danger for someone else
not when Shield can hide information or prevent healthy independence.

guard against
Clear checks guard against accidental duplicate payments.
guard the entrance
Two trained volunteers guard the entrance without intimidating visitors.
closely guard
The archive must closely guard addresses in the donated records.

Guarding people can become controlling or intrusive. The protected interest and consent should be clear.

The definition and the example on this page are written here. The dictionaries above ground which meaning is being described, not the wording.