1. adding vowel sounds or marks to written text, especially in languages where vowels are not normally written
Usage: linguistics; present participle of vowelize
2. pronouncing or articulating vowel sounds
Usage: phonetics; present participle of vowelize

Examples

• The Hebrew text requires vowelizing to help beginning readers.
• She is vowelizing the Arabic script for her students.
• The linguist spent hours vowelizing the ancient manuscript.
• Children practice vowelizing sounds when learning to read.
• The software assists in vowelizing texts in Semitic languages.
• He had difficulty vowelizing certain consonant clusters.