Bedeutung von “speak up” — Learner’s Dictionary

speak up

phrasal verb with speak us uk /spiːk/ verb past tense spoke, past participle spoken
TALK LOUDER

B2 to say something in a louder voice so that people can hear you:

Could you speak up a bit? I can't hear you.
OPINION

to give your opinion about something, especially about a problem or to support someone else:

It's getting bad - it's time someone spoke up about it.

(Definition von “speak up” aus dem Cambridge Learner's Dictionary © Cambridge University Press)