abirritative
v. C2 Proficiency abir·ri·ta·tive
v. to stop being angry or upset. It is a very formal word that describes the process of calming down after a strong emotion.
v. to cease being angry or excited; to become calm or quiet. Often used in the context of physiological or emotional states returning to a baseline.
The patient began to abirritative after the doctor explained the treatment.
The crowd gradually abirritative as the tension in the stadium began to dissipate.
The subject's heart rate began to abirritative once the stressful stimuli were removed from the laboratory environment.
From abirritate + -ive.