rimmed

The word 'rimmed' is a straightforward English formation. Its core, 'rim', descends from the Old English rima, which meant a border or edge, a term of Germanic origin. The addition of the adjectival suffix '-ed' (here realized as '-med' following the letter 'm') is a productive pattern in English for creating descriptive adjectives from nouns, indicating possession or provision of the noun's quality. Thus, 'rimmed' literally means "furnished with or having a rim," a meaning that has remained transparent and consistent from its morphological construction to its modern application in describing objects bordered by a distinct edge.

Structure: rim (edge) + med (adjective suffix) 'rim' is from Old English rima (border, edge, coast). '-med' is a variant of the past participle suffix '-ed', used here to form an adjective meaning "having the quality of" or "furnished with".