This is the 3384th most frequent Catalan word.
calvet
"Calvet" in Catalan means "baldy" or refers to a bald person.
In this sentence, 'calvet' is used as an adjective describing Joan's baldness in a diminutive or affectionate manner.
En Joan és molt calvet i li queda molt bé.
Joan is very bald and it suits him well.
Here, 'calvet' acts as a noun referring to a bald person, again in a diminutive or familiar way.
Vaig veure un calvet passejant pel parc.
I saw a bald man walking in the park.
In this example, 'calvet' describes the cat lacking fur, used affectionately.