'larvicide-associated' originates from Modern English, formed by compounding 'larvicide' and 'associated'. 'Larvicide' itself combines Latin 'larva' (originally meaning 'mask, ghost' and later used in biology for the immature form of an insect) and the combining form '-cide' from Latin 'cida/caedere' meaning 'killer' or 'to kill'; 'associated' comes via Old French/Latin from Latin 'associare' meaning 'to unite or join'.

'larvicide' was coined in scientific/medical usage by combining 'larva' + '-cide' to denote an agent that kills larvae; 'associate' passed from Latin 'associare' into Old French and Middle English as 'associate' and then 'associated' as its past participle/adjective form. In modern technical usage the two elements have been combined into the hyphenated compound 'larvicide-associated' to describe things connected to larvicides.

Initially, 'larvicide' meant 'an agent that kills larvae' and 'associated' meant 'joined or connected'; over time the compound 'larvicide-associated' has come to mean specifically 'connected with or attributable to larvicides' in scientific and technical contexts.