Sweat

noun

1. Fluid that exits the body through pores in the skin usually due to physical stress and/or high temperature for the purpose of regulating body temperature and removing certain compounds from the circulation.
2. The state of one who sweats; diaphoresis.

   "Just thinking about the interview tomorrow puts me into a nervous sweat."

3. (especially WWI) A soldier (especially one who is old or experienced).
4. The sweating sickness.
5. Moisture issuing from any substance.

   "the sweat of hay or grain in a mow or stack"