Unstressed is a term usually used in the context of linguistics, where it refers to the syllables in a word that are not emphasized or stressed. Some synonyms for unstressed include unaccented, weak, and light. Another term that can be used in place of unstressed is non-dominant. This refers to the idea that the unstressed syllables in a word do not have as much importance as the stressed syllables, and thus, they are considered to be of lesser dominance. Some other synonyms for unstressed could include muted, faint, and subdued. Ultimately, whichever term is used to describe the unstressed syllables in a word, the meaning remains the same - they are less prominent than the stressed syllables.