Etymology of the Italian word costume
the Italian word costume
derived from the Classical Latin word consuetudo (experience; empirical knowledge; sexual; habit, custom, usage)
derived from the Latin word consuetus (accustomed. used; customary, habitual)
derived from the Latin word consuescere (accustom oneself; become, be accustomed; be intimate, have sexual intercourse with; form a habit)
using the Latin prefix con- (together)
derived from the Latin word suescere (become accustomed)