1. to conceal or suppress one's excitement, eagerness, or keen interest in something
She tried to hide her enthusiasm when she heard about the promotion.
Ela tentou disfarçar seu entusiasmo quando ouviu sobre a promoção.
2. to deliberately remain composed or indifferent in order to appear less interested than one actually is
He couldn't hide his enthusiasm for the new project despite his attempts to stay professional.
Ele não conseguia disfarçar seu entusiasmo pelo novo projeto apesar de suas tentativas de permanecer profissional.