also deescalate, "reduce the intensity of," 1964, from de- "do the opposite of" + escalate. Related: De-escalated; de-escalating; de-escalation.
The war of words between them de-escalated with time
de-escalate a crisis
deep-sea
deep-seated
deep-set
deer
deerskin
de-escalate
def
deface
defacement
defalcate
defalcation