grader
UK[ˈɡreɪdə(r)]US[ˈɡreɪdər]
n
A person or machine that sorts things, especially agricultural products, by quality, size, or grade.
n
A person who marks or evaluates students' work.
n
(North American) A student in a specified grade at school (e.g., a fifth grader).
Morpheme Breakdown
grade
er
grade
to arrange in steps
er
agent suffix
Etymology
The word 'grader' is a transparent English compound built on the noun 'grade', which entered English in the 16th century from the Latin 'gradus', meaning 'a step, a degree, or a stage'. The Latin term itself derives from the Proto-Indo-European root gʰredʰ-, meaning 'to walk, to go'. The agent suffix '-er', of Germanic origin, is one of the most productive in English, used to denote a person or thing that performs an action. Therefore, the literal logic of 'grader' is 'one who arranges into steps or ranks', a meaning which seamlessly extends from a person who sorts produce or evaluates academic work to a machine that levels ground or a child in a specific step of the educational system.
Analysis
Structure: grade (to arrange in steps) + er (agent suffix)
grade (from Latin 'gradus', meaning 'step, degree, rank'); er (agent-forming suffix from Old English '-ere', from Proto-Germanic)
Examples
The apple grader sorted the fruit by size and color before packaging.
The teacher spent her evening as a grader, marking a stack of history essays.
My nephew is an excited third grader who just got his first library card.