'hydrogen-laden' originates from English, specifically from the compound of the word 'hydrogen' and the past-participle adjective 'laden'. 'Hydrogen' ultimately comes from Greek roots (via New Latin/French) where 'hydōr' meant 'water' and '-genes' meant 'forming'; 'laden' comes from Old English (past participle of a verb meaning 'to load' or 'to place a burden on').

'hydrogen' entered scientific vocabulary from French 'hydrogène' (coined in the 18th century) from Greek elements 'hydōr' + 'genes', and became the modern English 'hydrogen'. 'Laden' evolved from Old English 'hladan' (to load) to the past-participle/adjective 'laden', later used in compounds (e.g. 'wool-laden') and ultimately forming compounds like 'hydrogen-laden'.

Initially, 'hydrogen' literally meant 'water-forming' (because hydrogen produces water when burned in air); over time it came to denote the chemical element hydrogen. 'Laden' originally meant 'burdened' or 'loaded' and later broadened to mean 'filled with' when used in compounds—thus 'hydrogen-laden' now means 'filled with or containing hydrogen'.