This is the 9283rd most frequent Spanish word.
actuar
To act or perform.
In this sentence, 'actuar' is used to mean 'to act' as a performer in a play or theater.
Él decidió actuar en la obra teatral del colegio.
He decided to act in the school theatrical play.
Here, 'actuar' means 'to take action' or 'to do something' in response to a situation.
Debemos actuar rápidamente para resolver el problema.
We must act quickly to solve the problem.
In this context, 'actuar' is used to signify 'to behave' or 'to conduct oneself in a certain way.'