Meaning of “speed (sth) up” - Learner’s Dictionary

speed (sth) up

phrasal verb with speed uk us /spiːd/ verb (past tense and past participle sped, speeded)

to move or happen faster, or to make something move or happen faster:

Can you try to speed up a bit please?

(Definition of “speed (sth) up” from the Cambridge Learner’s Dictionary © Cambridge University Press)