to pretend to be brave when you are actually scared or worried
jab aap waaqayi dar ya chinta mehsoos kar rahe hote hain tab sahasi hone ka naatak karna (jab aap waaqayi dar ya chinta mehsoos kar rahe hote hain tab sahasi hone ka naatak karna)
"She put on a brave face despite feeling nervous inside."
"Usne ek sahasi chehra lagaya, bhale hi andar se wo chinta mehsoos kar rahi thi." (Usne **ek sahasi chehra** lagaya, bhale hi andar se wo chinta mehsoos kar rahi thi.)
when something is difficult to learn, usually quickly
to understand the larger or more important issue
very close friends who share everything
to expect or plan for something
to consume something completely
to challenge someone to prove their authority or claim