This is the 15983rd most frequent Russian word.
прощальные
"Прощальные" means "farewell" or "parting" in English.
The word 'прощальные' is used as an adjective describing 'слова', meaning words of farewell.
Прощальные слова коснулись глубины их сердец.
The farewell words touched the depths of their hearts.
The word 'прощальный' is used as an adjective describing 'подарок', meaning a gift intended as a farewell gesture.
Она подарила прощальный подарок учителю.
She gave a farewell gift to the teacher.
The word 'прощальные' is used as an adjective describing 'эмоции', referring to feelings associated with saying goodbye.