alarmarse bedeutet auf Englisch

panic [panicked, panicking, panics]▼(to feel panic)
verb
[UK: ˈpæ.nɪk] [US: ˈpæ.nɪk]That's not a reason to panic. = No hay ningún motivo para alarmarse.

startle [startled, startling, startles]▼(to move or be excited on feeling alarm)
verb
[UK: ˈstɑːt.l̩] [US: ˈstɑːr.tl̩]