ruler
UK[ˈruːlə(r)]US[ˈruːlər]
n
A person who governs a country or state.
n
A long, flat, straight strip of plastic, wood, or metal, marked at regular intervals and used to draw straight lines or measure distances.
Morpheme Breakdown
rule
er
rule
to govern, to mark lines
er
agent/instrument suffix
Etymology
The word 'ruler' has a dual meaning that stems directly from its Latin ancestor. It originates from Latin regula, meaning a straight stick, bar, or pattern, which itself derives from the verb regere, 'to keep straight, to guide, to rule'. The agent/instrument suffix '-er' was added in Middle English. This combination logically produced a noun that can denote both a person who guides or governs (an agent) and the physical tool used for drawing straight lines or measuring (an instrument). Thus, the core concept of imposing order, straightness, or control unifies the abstract leader and the concrete measuring device.
Analysis
Structure: rule (to govern, to mark lines) + er (agent/instrument suffix)
- rule: From Old French riule, reule, from Latin regula (straight stick, pattern, principle). Functions as the core semantic base.
- er: From Old English -ere, from Proto-Germanic -ārijaz (agent suffix). Functions as a derivational suffix forming agent or instrument nouns.
Examples
The ancient pharaoh was considered a divine ruler.
Use a ruler to draw a straight line between the two points.
She measured the width of the paper with a transparent plastic ruler.