This is the 236th most frequent Portuguese word.
vários
Several; various.
'Vários' is used here as an adjective to indicate a plural and unspecified quantity, meaning 'several.'
Vários pássaros voavam pelo céu.
Several birds were flying in the sky.
In this sentence, 'vários' conveys the idea of multiple or many, used as an adjective to describe 'motivos' (reasons).
Ele tinha vários motivos para ficar feliz.
He had several reasons to be happy.
The word 'vários' describes the amount of 'moedas antigas' (old coins) and is used as an adjective indicating quantity.