1. A measured or restrained form of enthusiasm; interest or excitement expressed in a calm, composed, or detached manner
She expressed cool enthusiasm about the project, showing interest without excessive excitement.
Ela demonstrou entusiasmo contido sobre o projeto, mostrando interesse sem excitação excessiva.
2. Mild or lukewarm interest masked by an appearance of calmness or sophistication
His cool enthusiasm for the idea suggested he wasn't entirely convinced.
Seu entusiasmo contido pela ideia sugeriu que ele não estava totalmente convencido.