This is the 435th most frequent Spanish word.
cierto
"True" or "certain."
Here, 'cierto' is used as an adjective meaning 'certain' or 'a certain degree of,' indicating an unspecified but noticeable quality.
Había una cierta inquietud en el ambiente.
There was a certain uneasiness in the atmosphere.
In this usage, 'cierto' describes a state of being sure or certain, aligning with its adjectival function to express certainty.
No estoy cierto de los detalles.
I am not sure of the details.
In this sentence, 'cierto' functions as an adjective meaning 'true' or 'correct,' highlighting the truthfulness of the statement.