This is the 4063rd most frequent Catalan word.
descobert
"Descobert" means "uncovered" or "discovered" in English.
The word 'descobert' is used as an adjective, meaning 'uncovered' or 'exposed'.
He deixat el cotxe al descobert.
I left the car uncovered.
Here, 'descobrir' in its past form is used as a verb, meaning 'to discover' or 'to find out'.
Vaig descobrir un nou restaurant a la ciutat.
I discovered a new restaurant in the city.
In this context, 'a descobert' is a set phrase meaning 'overdrawn' or 'in deficit' in a financial sense.