Decorate
/ˈdɛkəɹeɪt/
verb
To furnish with decorations.
“We decorated the Christmas tree with tinsel and baubles.”
To improve the appearance of an interior of, as a house, room, or office.
“There's some paint left over from when we decorated the guest bedroom.”
To decorate an interior space, as a house, room, or office.
“People tend to decorate for the holidays or special events.”