In Spanish, the word for sweat is sudor. It is a noun that refers to the moisture exuded through the pores of the skin, especially when one is hot, nervous, or exerting oneself.
For example, you might say: Después de correr, tenía sudor en la frente. (After running, I had sweat on my forehead.)
Understanding this term can be particularly useful when discussing physical activities, weather, or health-related topics in Spanish.