lemongrass

The word is a transparent English compound, formed by directly combining two common nouns. 'Lemon' entered English via Old French and Arabic, tracing back to a Persian word for citrus fruit. 'Grass' is a native English word of Germanic origin, from Proto-Indo-European gʰreH₁- ('to grow, become green'). The compound 'lemongrass' logically names the plant by its most distinctive characteristic—its strong, lemon-like aroma—rather than its botanical lineage. This practical naming convention is typical for culinary and aromatic herbs, where sensory qualities take precedence over scientific classification.

Structure: lemon (citrus fruit) + grass (plant) lemon: From Old French limon, ultimately from Arabic laymūn and Persian līmūn. Functions as a noun modifier describing scent/flavor. grass: From Old English græs, meaning 'herb, plant'. Functions as the head noun denoting the type of plant.