This is the 14532nd most frequent Russian word.
паромная
"Паромная" means "ferry-related" or "pertaining to a ferry."
Here, "паромная" is used as an adjective describing "переправа" (crossing), indicating it is related to a ferry.
Паромная переправа была закрыта из-за сильного ветра.
The ferry crossing was closed due to strong winds.
In this sentence, "паромная" is used as an adjective for "станции" (station), showing the station's association with ferries.
Она работает на паромной станции возле порта.
She works at the ferry station near the port.
"Паромном" here is the adjective form 'паромная' in instrumental case, modifying "терминале" (terminal) to convey its relation to ferries.