Phonology is how sounds combine together to make words. Phonological awareness is the ability to segment words into sounds and manipulate sounds in words. A phonological disorder occurs when a child does not know the rules for putting these sound together. Phonology is considered to be a language-based disorder affecting language, reading, and writing development. Children with phonology disorders are often unintelligible to most listeners and are at risk for future language, reading, and writing disabilities.