The term 'radiate out' can be summarized by the word 'EMIT'. To EMIT something is to send out energy or particles in the form of waves or particles. This could include light, heat, sound, or other forms of energy. Emitting something is often associated with radiating, which is the process of sending out energy in all directions from a single source. Radiating out is a common phenomenon in nature, and is seen in many everyday objects such as the sun, stars, and fire.