The word "rounded" refers to something that has a smooth, curved shape or is free from sharp angles or edges. It can also describe a more metaphorical sense of being well-developed, comprehensive, or complete in terms of character or education.
The word "rounded" comes from the root word "round," which has its origins in the Old English word "rund," meaning "circular" or "shaped like a circle." The suffix "-ed" is a common English ending used to form the past participle of verbs or to create adjectives.