Lactate (verb)

1. To secrete milk from the mammary glands, especially of a female mammal after giving birth.
2. To produce or give off lactate, a compound formed during cellular respiration.

Origin:

From latin lactis (milk).

Examples:

1. The cow will lactate for several months after giving birth.
2. During intense exercise, the muscles will begin to lactate, causing fatigue and soreness.