pulse
This word evokes a sense of vitality and rhythmic regularity. It is deeply tied to the concept of life and energy, whether that energy is biological, electronic, or musical. When used, it suggests a cycle of tension and release, a beating heart, or a flashing signal.
Countable when referring to a specific burst of energy or a single heartbeat. Uncountable when referring to the general rhythmic quality of music or the biological phenomenon of blood flow.
Meanings
The rhythmic throbbing of the arteries as blood is propelled throughout the body.
"The doctor checked the patient's pulse."
A single vibration or short burst of electric current or light.
"The laser emits a high-energy pulse."
The steady, driving beat of a piece of music.
"The song has a strong, danceable pulse."
To vary in intensity or brightness in a rhythmic way.
"The warning light began to pulse red."