I don't understand if "rise" in the context is an Italian term or is an English term. In Italian "rise" exists and means "he or she or it (poetic) laughed". The English verb "to rise" in Italian is : salire, sorgere, sollevarsi (reflexive form). Maybe the form of the sentence was: "a quella frase rise". In that case "rise" is an irregular verbal form of past simple ("passato remoto" in italian) The verb in the infinite form is "ridere" (to laugh) , and the meaning of the sentence is: "after having heard that phrase he/she laughed".