フォルティシモalso: フォルティッシモ · フォルティッスィモFreq.FrequencyTop 100,000Meanings1nounfortissimomusicMusical term meaning very loud; often abbreviated as 'ff' in scores.from Italianこの部ぶ分ぶんはフォルティシモで演えん奏そうしてください。Please play this section fortissimo.