explained
I explained the situation to him.
I explained the process to him.
Spiegai la ragione in dettaglio.
I explained the reason in detail.
Le spiegai che fu tutto a causa dell'Africa.
I explained to her that it was all because of Africa.
— Manon delle sorgenti (1986)
I didn’t explain how I knew.
Spiegai l'incidente a Tom.
I explained the accident to Tom.