The term "unrounded" is used to describe objects or shapes that lack smooth curvature or rounded edges. Some synonyms for this word include angular, sharp, harsh, jagged, rough, and ragged. These words can all be used to describe shapes that are characterized by hard edges or corners, rather than smooth curves. The word "unrounded" can also be used to describe speech sounds that are pronounced with a flat or unrounded mouth position, such as the vowel sound in the word "cat." Some synonyms for this type of unrounded sound include tense, spread, and wide. All of these words can help to describe objects, shapes, or sounds that lack a smooth or rounded quality.