This is the 55th most frequent Lithuanian word.
vieną
"Vieną" means "one" (accusative case) in English.
The word 'vieną' here is used as a numeral meaning 'one', expressing quantity and gender agreement with the noun.
Aš turiu vieną draugą.
I have one friend.
'Vieną' in this sentence still acts as a numeral but is modified to match the grammatical case of the noun it describes, indicating a specific instance.
Man reikia tik vieną šansą.
I only need one chance.
Here, 'vieną' continues to denote quantity, emphasizing that it is a singular item with further descriptive attributes.