The phonetic transcription of "to a great extent" is /tuː ə ɡreɪt ɪkˈstɛnt/ in British English and /tuː ə ɡreɪt ɪkˈstɛnt/ in American English. Click the 🔊 button to hear both pronunciations.
Synonyms for "to a great extent": largely, mostly, significantly, greatly.
Example usage of "to a great extent": "I agree to a great extent with what you're saying.". More examples on the page.