This is the 2677th most frequent Spanish word.
facial
Facial: Related to the face.
In this sentence, 'facial' is used as an adjective describing the type of treatment.
Ella se hizo un tratamiento facial en el spa.
She got a facial treatment at the spa.
Here, 'facial' functions as an adjective describing the mode of recognition used by the phone.
El reconocimiento facial de su teléfono desbloquea la pantalla.
The facial recognition on her phone unlocks the screen.
In this context, 'facial' again serves as an adjective specifying the type of exercises described.