fortissimo
adverb
[ fɔːˈtɪsɪməʊ ]
• (especially as a direction) very loudly.
• "he plays fortissimo at one point in the finale of the Rachmaninoff"
fortissimo
adjective
• played very loudly.
• "the movement ends with a fortissimo coda"
fortissimo
noun
• a passage marked to be performed very loudly.
• "Tchaikovsky's fortissimos are given plenty of weight in the bass"
Origin:
Italian, from Latin fortissimus ‘very strong’.