Today's Parola del Giorno is the verb, prefiggersi (uno scopo), which means to set (a goal), to set one's sights on something, or to be determined to do something (prefiggersi di fare qualcosa).
The past participle is prefisso.
Essere is used in compound tenses.
See the verb used below in its context:
Figlia: Mamma, non so cosa fare prima: vorrei inizia…