fourth-grader

The compound noun "fourth-grader" is a transparent American English construction from the 20th century, directly indicating a student's specific standing within the graded school system. The first element, "fourth," derives from the ancient Proto-Indo-European root kʷetwóres for the number four, which passed into Old English as fēower, with its ordinal form gaining the suffix -tha. The second element, "grader," employs the agent-forming suffix -er attached to "grade," a term borrowed from Latin gradus (a step or stage). Thus, the word's literal logic is "one who is in the fourth step" of the educational progression, cleanly mapping the sequential structure of schooling onto the student's identity.

Structure: fourth (ordinal number) + grader (one who is in a grade) - fourth: From Old English fēowertha, fēortha, from the cardinal number fēower (four) + the ordinal suffix -tha. The form evolved through Middle English fourthe. - grader: From the noun grade (a level in school) + the agent suffix -er (one who is or does). Grade originates from Latin gradus (step, degree).