This is the 3469th most frequent Spanish word.
estímulo
"Estímulo" means "stimulus" or "incentive" in English.
Here, 'estímulo' is used to mean encouragement or motivation.
El estímulo de las palabras positivas puede motivar a las personas.
The encouragement from positive words can motivate people.
In this context, 'estímulo' refers to a physical or chemical agent that acts upon a biological system, a stimulus.
Los científicos estudiaron el estímulo eléctrico en las fibras nerviosas.
The scientists studied the electrical stimulus on nerve fibers.
Here, 'estímulo' is used metaphorically to describe something that sparked creativity.