'narrow-fruited' originates from English, combining the adjective 'narrow' and the past-participial/adjectival form 'fruited' (from the noun 'fruit' + suffix '-ed'), where 'narrow' originally meant 'small in width' and 'fruited' meant 'having fruit'.

'fruited' is formed from the noun 'fruit' (from Old French 'fruit', from Latin 'fructus'), while 'narrow' comes from Old English 'nearu' (meaning 'narrow, confined'); the compound 'narrow-fruited' is a modern descriptive formation used in botanical English.

Initially, 'narrow' simply described limited width and 'fruited' indicated bearing fruit; over time the compounded adjective 'narrow-fruited' has been used specifically in botanical contexts to mean 'bearing narrow (slender) fruits.'