to always be ready to help or obey someone
siempre estar listo para ayudar o obedecer a alguien (siempre estar listo para ayudar o obedecer a alguien)
"The assistant is at his boss’s beck and call."
"El asistente está a la disposición de su jefe." (El asistente está **a la disposición de su jefe**.)
to make sure everything is fair or equal
to be responsible for something and able to explain it
to be patient; to wait
to behave in a confident and assured way
to quickly become good friends
to have something very valuable that is not yet realized