This is the 40th most frequent French word.
très
Very.
Here 'très' is used to intensify the adjective 'intelligente'.
Elle est très intelligente.
She is very intelligent.
In this case, 'très' strengthens the intensity of the adjective 'froid'.
Il fait très froid aujourd'hui.
It is very cold today.
Here 'très' serves to enhance the descriptive adjective 'intéressante'.