This is the 10209th most frequent Catalan word.
percebre
To perceive.
In this sentence, 'percebre' is used to describe the action of noting or sensing something through the senses (sight, sound, touch, etc.).
Ell va percebre un soroll estrany al jardí.
He perceived a strange noise in the garden.
Here, 'percebre' refers to the cognitive process of understanding or becoming aware of something abstract or mental.
És difícil percebre els canvis subtils en la seva actitud.
It is difficult to perceive the subtle changes in his attitude.
This usage of 'percebre' signifies the recognition or realization of progress or improvement.