'larvae-laden' originates from Modern English, specifically the words 'larvae' and 'laden', where 'larvae' is the plural of Latin 'larva' and 'laden' is the past participle of Old English 'hladan' (to load).

'larvae' comes from Latin 'larva' (originally meaning 'ghost' or 'mask') and was adopted in scientific Latin to mean the immature stage of an insect; 'laden' comes from Old English 'hladan' (to load), became Middle English 'laden' (past participle of 'lade'), and the two elements combined in Modern English as the compound 'larvae-laden'.

Initially, Latin 'larva' meant 'ghost' or 'mask', but in scientific usage it came to mean the immature stage of an insect; 'laden' originally meant 'loaded' (to place a burden) and evolved into a descriptive modifier meaning 'full of' in compounds—together yielding the modern sense 'full of larvae'.