disarm

Concise Oxford English Dictionary © 2008 Oxford University Press:
disarm/dɪsˈɑːm/

▶verb

• 1 take a weapon or weapons away from.

  ■ (of a country or force) give up or reduce its armed forces or weapons.

  ■ remove the fuse from (a bomb).

• 2 deprive of the power to hurt.

  ■ (often as adj. disarming) allay the hostility or suspicions of.

▶noun Fencing an act of disarming an opponent.

– derivatives
disarmer noun,
disarmingly adverb.