невъзмутим означава в английски

imperturbable▼(not easily perturbed)
adjective
[UK: ˌɪm.pə.ˈtɜː.bəb.l̩] [US: ˌɪm.pə.ˈtɝː.bəb.l̩]

unabashed▼(not disconcerted or embarrassed)
adjective
[UK: ˌʌ.nə.ˈbæʃt] [US: ˌʌ.nə.ˈbæʃt]

unflappable▼(remaining composed and level-headed at all times)
adjective
[UK: ˌʌn.ˈflæ.pəb.l̩] [US: ən.ˈflæ.pəb.l̩]

unperturbed▼(not perturbed)
adjective
[UK: ˌʌn.pə.ˈtɜːbd] [US: ˌʌn.pər.ˈtɝːbd]