to do what you promise to do
hacer lo que prometes hacer (hacer lo que prometes hacer)
"You can trust him; he always keeps his word."
"Puedes confiar en él; siempre cumple su palabra." (Puedes confiar en él; siempre **cumple su palabra**.)
to talk too much and for a long time
to deal with a lot of information or material
to suddenly become afraid to do something
to perform well in a difficult situation
before the expected or planned time
to say exactly what you think