Denuclearize

v.hopeful, calmprofessional

What it means

To remove nuclear weapons or military nuclear capability from a place or force.

Reach for it when describing a verified reduction of nuclear military capacity

The agreement would denuclearize the region through inspected steps.

everyday
eliminate
when complete removal is the verified result
not when Eliminate is absolute and should not describe a partial reduction.
professional
decommission
when a system is formally retired from service
not when Decommissioning can leave materials or military capacity in place.
professional
disarm
when reducing or removing weapons more broadly is intended
not when Disarm includes conventional weapons and need not remove nuclear infrastructure.
professional
dismantle
when facilities or weapons are physically taken apart
not when Dismantling hardware leaves verification, materials, and other capabilities unresolved.
formal
abolish
when ending a weapons program as policy is central
not when Abolish states an institutional end but not how stockpiles are secured.
formal
demilitarize
when all military forces or installations leave an area
not when Demilitarize is broader and can occur while nuclear capability remains elsewhere.

denuclearize the region
Inspectors would verify each stage used to denuclearize the region.
fully denuclearize
The parties disagreed about what evidence would show they had fully denuclearized.
commit to denuclearize
The treaty asks every signatory to commit to denuclearize under inspection.

Nuclearize is uncommon but is the closest single-word directional antonym; rearm and arm are broader contrasts.

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