calmarse bedeutet auf Englisch

calm down▼(To become less excited)
verb
[UK: kɑːm daʊn] [US: ˈkɑːm ˈdaʊn]

settle down▼(to become quiet)
verb
[UK: ˈset.l̩ daʊn] [US: ˈset.l̩ ˈdaʊn]

subside [subsided, subsiding, subsides]▼(to fall into a state of calm; to settle down; to become tranquil; to abate)
verb
[UK: səb.ˈsaɪd] [US: səb.ˈsaɪd]