semicircle
UK[ˈsemiˌsɜːkl]US[ˈsemiˌsɜːrkl]
n
a half of a circle, or something arranged in this shape.
Morpheme Breakdown
semi
circle
semi
half
circle
round shape
Etymology
the word "semicircle" is a straightforward compound formed within english from two classical elements. the prefix "semi-" derives directly from latin, where it consistently meant "half". the base word "circle" entered english via old french 'cercle', tracing back to the latin diminutive 'circulus', meaning "a little ring", itself from 'circus', meaning "ring, circle". the compound's logic is entirely transparent, literally meaning "half-circle", which has remained its precise geometric and descriptive meaning since its formation.
Analysis
Structure: semi (half) + circle (round shape)
semi (latin origin, meaning "half", a prefix); circle (from latin 'circulus', meaning "small ring, circular figure", the base noun).
Examples
the students sat in a semicircle around the teacher.
the ancient amphitheater was built in a perfect semicircle.
draw a semicircle with a compass to complete the diagram.