Sound out
Definition 1 of 2
Pro Tip 1/3Phonetic Breakdown
Divide unknown words into smaller parts to decode them. 
To improve reading, she would sound out each syllable.
Pro Tip 2/3Reading Aloud
Practicing sounding out loud reinforces correct pronunciation. 
Johnny sounded out the word 'encyclopedia' loudly in class.
Pro Tip 3/3Clarification Tool
Use it to clarify pronunciation when learning new vocabulary. 
During her Spanish lesson, she sounded out 'biblioteca' carefully.