'larvicidal-related' originates from modern English, specifically from the adjective 'larvicidal' combined with 'related', where 'larvicidal' is formed from 'larva' + the suffix '-cidal' meaning 'killing' (from Latin roots) and 'related' denotes connection or relevance.

'larvicidal' was formed in scientific English by affixing the Latin-derived suffix '-cidal' (from Latin 'caedere' meaning 'to kill') to 'larva' (from Latin 'larva'), creating 'larvicidal'; later, combining this with the adjective 'related' produced the compound adjective 'larvicidal-related' to express relation to larvicidal matters.

Initially, 'larvicidal' meant 'capable of killing larvae'; over time, compounds like 'larvicidal-related' came to mean 'pertaining to or associated with actions, agents, studies, or factors concerning larva-killing' without implying the agent itself performs killing.