This is the 5992nd most frequent Portuguese word.
cav
"Cav" is not a standard Portuguese word; it may be an abbreviation or typo.
Here, 'cavalo' is used to mean 'horse', which is a direct translation and refers to the animal.
O cavalo corria livre pelo campo.
The horse was running freely across the field.
Here, 'cavou' is used as the past tense of 'cavar', meaning 'to dig', indicating the action of digging.
Ela cavou um buraco no jardim para plantar flores.
She dug a hole in the garden to plant flowers.
Here, 'cavalo' again means 'horse', used in a possessive context.