alertar verb | alert [alerted, alerting, alerts](to give warning to) verb [UK: ə.ˈlɜːt] [US: ə.ˈlɝːt]You're very alert. = Tú estás muy alerta. warn [warned, warning, warns](to make someone aware of impending danger) verb [UK: wɔːn] [US: ˈwɔːrn]I'll warn John. = Alertaré a John. |