Today's Parola del Giorno is the weather verb imbrunire, which means to get/grow dark(er).
This -ire verb is also an -isc- verb.
Remember that verbs that describe the weather are used only in the third person (la terza persona)!
See the verb used below:
Dopo l'estate, le giornate si accorciano velocemente e ogni giorno imbrunisce sempre prima del precedent…