Definition of de-escalation in US English:

de-escalation

noun

  • Reduction of the intensity of a conflict or potentially violent situation.

    ‘de-escalation is a priority for all law enforcement agencies’
    as modifier ‘both situations could have easily been avoided with de-escalation techniques’

Pronunciation

de-escalation

/ˌdēˌeskəˈlāSH(ə)n//ˌdiˌɛskəˈleɪʃ(ə)n/