Today's Parola del Giorno is the verb smagnetizzare, which means to demagnetize. The past participle is smagnetizzato.

When the verb is pronominal (used like a reflexive verb, smagnetizzarsi), it means to become demagnetized. 

See the verb used below in its context:

È la seconda volta questo mese che provo a prelevare denaro al bancomat ma non ci riesco. Forse mi si è smagnetizzata la carta di credito.

It is the second time this month that I have tried to get money from the ATM, but I can't. Perhaps my credit card has become demagnetized.