vs
QUICK ANSWER
"Sudden" is an adjective which is often translated as "repentino", and "suddenly" is an adverb which is often translated as "de repente". Learn more about the difference between "sudden" and "suddenly" below.
sudden(
suh
-
dihn
)An adjective is a word that describes a noun (e.g., the big dog).
1. (abrupt)
a. repentino
The cold snap caused a sudden temperature drop.La ola de frío causó una caída repentina de la temperatura.
b. inesperado
The prime minister is facing a sudden coup attempt.El primer ministro se enfrenta a un intento de golpe inesperado.
c. súbito
James was struggling to cope with his father's sudden death.A James le estaba costando sobrellevar la muerte súbita de su padre.
e. precipitado
Romeo and Juliet's romance was very sudden.El romance de Romeo y Julieta fue muy precipitado.
suddenly(
suh
-
dihn
-
li
)An adverb is a word that describes a verb, an adjective, or other adverbs (e.g., to run quickly, very tired).
a. de repente
He wanted to go to the movies, but suddenly changed his mind.Quería ir al cine, pero cambió de idea de repente.
2. (abruptly)