This is the 9355th most frequent Portuguese word.
clandestino
"Clandestino" means "secret, illegal, or unauthorized, often referring to something done in hiding."
The word 'clandestino' here is used to denote secrecy and illegality in the act of entering the country.
Ele entrou no país de forma clandestina.
He entered the country clandestinely.
'Clandestino' describes someone or something operating outside legal or recognized norms, here referring to an illegitimate merchant.
O vendedor clandestino oferecia produtos sem nota fiscal.
The clandestine seller offered products without a fiscal receipt.
In this context, 'clandestino' characterizes the operation as being hidden and likely illicit in nature.