Which term describes the action of producing and discharging something?

The term that best describes the action of producing and discharging something is "emit." To emit means to release or discharge a substance, such as light, heat, gas, or sound. This action typically involves the generation of something that is then sent out into the environment. An example of this would be a factory emitting smoke or a light bulb emitting light.

While "generate" is close in meaning, it primarily refers to the creation of something, which may not always involve the immediate action of discharging it. "Conceal" implies hiding or keeping something from view, which is the opposite of producing or discharging. "Absorb" refers to taking in or soaking up a substance, rather than releasing it. Therefore, emit accurately captures the essence of producing and discharging something.