ataviar
dress up
attire
formal clothing
+
-ar
verb suffix
Ataviar means to dress up and can be thought of as attire0 (formal clothing0) + -ar1 (verb suffix1).
verb
- dress upTo dress or adorn someone, especially in an elegant or elaborate mannerLa novia se atavió con un hermoso vestido blanco. // The bride dressed up in a beautiful white gown.