What is a suffix?

A suffix is indeed an affix that is attached to the end of a word. This definition is critical because suffixes can change the meaning of the original word or indicate grammatical modifications, such as tense or part of speech. For instance, adding "-ing" to "play" transforms it into "playing," indicating a continuous action. Similarly, adding "-ed" to "wait" changes it to "waited," suggesting the past tense.

Understanding suffixes is essential in reading instruction, as they help students decode and comprehend new words. Recognizing a suffix can provide clues about a word's meaning and its use in context, making it easier for learners to expand their vocabulary. This foundational knowledge supports effective communication and literacy development. The other options describe different linguistic concepts, but they do not accurately define what a suffix is.