a person who knows a lot about many subjects
una persona que sabe mucho sobre muchos temas (una persona que sabe mucho sobre muchos temas)
"Ask him anything about history—he’s a walking encyclopedia."
"Pregúntale cualquier cosa sobre historia: él es una enciclopedia ambulante." (Pregúntale cualquier cosa sobre historia: él es **una enciclopedia ambulante**.)
when something begins to decline in quality or popularity
a person who exaggerates or overreacts to situations
a report confirming good health
to hear news or rumors indirectly
to give in or fail due to too much stress or pressure
a person who looks very healthy