This is the 353rd most frequent Catalan word.
sol
"Sol" in Catalan means "sun" or "alone" depending on the context.
The word "sol" is used as a noun meaning "sun".
Avui el sol brilla amb força.
Today the sun shines brightly.
Here, "sol" is an adjective meaning "alone."
Ell sempre treballa sol.
He always works alone.
In this case, "sol" functions as part of the phrase to mean "only."