to submit something to someone in authority
entregar algo a alguien con autoridad (entregar algo a alguien con autoridad)
"Please hand in your assignment by Friday morning."
"Por favor, entrega tu tarea antes del viernes por la mañana." (Por favor, entrega tu tarea antes del viernes por la mañana.)
start working efficiently or properly
to become very excited or enthusiastic about something
to fail to achieve the intended result
to control all parts of judging and punishing someone
to keep something secret
to start behaving more responsibly.