Sostinente pianoforte refers to the sustained notes on a piano. It is a pianistic technique used to create a smooth and continuous sound. Other synonyms for this term include sustain pedal, sustain foot, and damper pedal. These terms all describe the same technique, which involves depressing a foot pedal that lifts the dampers off the strings, allowing them to vibrate more freely and creating a sustained sound. Other related terms that can be used include the pedal, legato, and tenuto. Together, these techniques allow for greater expression and dynamic contrast in piano music, making it a vital aspect of piano playing.