ppp ("triple piano"), standing for pianississimo and meaning "very very quiet". fff ("triple forte"), standing for fortississimo and meaning "very very loud".
What does two F's mean in music?
In music, p stands for the Italian word piano, which means "quiet." The letter f stands for the Italian word forte, which means "loud." The composer adds these types of instructions to help the musician to portray the mood of the music. ... A double f, ff , stands for fortissimo, which means "very loud."
Is there a Fortissississimo?
A directive to perform the indicated passage as loudly as possible symbolized by "ffff". Louder than fortississimo "fff". See more about dynamic marks in the Appendix.