'age-associated' is a compound word formed from 'age' and 'associated', where 'age' originates from Latin 'aetas', meaning 'period of life', and 'associated' comes from Latin 'associatus', meaning 'joined with'.

'age' evolved from Old French 'aage', and 'associated' from Old French 'associer', eventually forming the modern English compound 'age-associated'.

Initially, 'age' referred to a period of life, and 'associated' meant joined with. Together, they now refer to phenomena linked with aging.