This is the 2944th most frequent French word.
frontalière
"Frontalière" means "border-related" or "pertaining to a border."
'Frontalière' is used as part of a noun phrase to indicate that the cooperation involves parties across a border.
Elle travaille dans la coopération frontalière.
She works in cross-border cooperation.
'Frontalière' is used as an adjective describing the region near the border between countries.
La ville est située dans une région frontalière.
The city is located in a border region.
'Frontalière' is used as an adjective modifying the noun 'commerce' to specify that the trade pertains to the area around a border.