This is the 9857th most frequent Spanish word.
bañar
To bathe.
The verb 'bañar' is used here to describe the act of cleaning or giving a bath to the dog.
Voy a bañar al perro esta tarde.
I am going to bathe the dog this afternoon.
'Bañar' refers to the action of immersing oneself or spending time in water for leisure.
Me gusta mucho bañar en el río los fines de semana.
I really enjoy bathing in the river on weekends.
In this sentence, 'bañar' emphasizes the necessity of cleaning oneself due to being dirty.