vs 

QUICK ANSWER
"Decide" is a form of "decidir", a transitive verb which is often translated as "to decide". "He decidido" is a form of "he decidido", a phrase which is often translated as "I've decided". Learn more about the difference between "decide" and "he decidido" below.
decidir(
deh
-
see
-
deer
)
A transitive verb is a verb that requires a direct object (e.g., I bought a book.).
transitive verb
a. to decide
Su hija aún no ha decidido qué quiere estudiar.Their daughter has not yet decided what she wants to study.
a. to decide
Decidamos qué vamos a cenar.Let's decide what to have for dinner.
b. to choose
Al final decidimos quedarnos en vez de emigrar.In the end we chose to stay rather than emigrate.
decidirse
A pronominal verb always uses a reflexive pronoun. (e.g., Te ves cansado.).
pronominal verb
a. to make up one's mind
Todo lo que tienes que hacer es decidirte y pasar a la acción.All you have to do is make up your mind and take action.
Copyright © 2025 Dictionary Media Group, Inc.
he decidido(
eh
 
deh
-
see
-
dee
-
doh
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. I've decided
He decidido que quiero vivir en el campo en lugar de en la ciudad.I've decided I want to live in the country instead of the city.
Copyright © 2025 Dictionary Media Group, Inc.