This is the 5666th most frequent Spanish word.
razonablemente
Reasonably.
In this sentence, 'razonablemente' is used as an adverb describing the manner in which the subject acted.
Él actuó razonablemente bajo la presión de la situación.
He acted reasonably under the pressure of the situation.
Here, 'razonablemente' is an adverb modifying the adjective 'rápido', indicating a moderate or acceptable level of speed.
El proyecto fue completado razonablemente rápido.
The project was completed reasonably quickly.
In this usage, 'razonablemente' introduces the reasonableness of the decision made by the subjects, functioning almost as a sentence adverb.