This is the 1624th most frequent French word.
subir
To undergo, endure, or suffer.
The word 'subir' is used here in the sense of undergoing or enduring something mandatory and typically unpleasant, like a medical procedure.
Elle a dû subir une opération chirurgicale complexe.
She had to undergo a complex surgical operation.
In this sentence, 'subir' conveys the experience of enduring or suffering a negative external event, like financial loss.
Il a subi une lourde perte financière après la crise.
He suffered a heavy financial loss after the crisis.
Here, 'subir' is used to indicate undergoing a change or process, in this case, renovations to enhance or improve the old buildings.