The word "speak up" in English means: To talk louder so people can hear you., To express your opinion frankly and openly..
The phonetic transcription of "speak up" is /ˌspiːk ˈʌp/ in British English and /ˌspiːk ˈʌp/ in American English. Click the 🔊 button to hear both pronunciations.
Synonyms for "speak up": louden, vocalize, express, state, declare, assert.
Example usage of "speak up": "Please speak up, I can't hear you.". More examples on the page.