to stop believing in your own ability or someone else’s
perder la confianza (perder la confianza)
"Don’t lose confidence after one failure."
"No pierdas la confianza después de un fracaso." (No pierdas la confianza después de un fracaso.)
to express yourself so that others understand you easily
to hand over a duty or responsibility to someone else
to prepare energetically for something
to be in control of a situation
to handle several tasks or responsibilities at once
to be the best or most successful in a situation