'reliably-held' originates from the combination of 'reliable' and 'held', where 'reliable' comes from the Latin word 'reliabilis', meaning 'that may be relied on', and 'held' is the past participle of 'hold', from Old English 'healdan'.

'reliable' evolved from the Latin 'reliabilis' through Old French 'reliable', and 'held' from Old English 'healdan', eventually forming the modern English compound adjective 'reliably-held'.

Initially, 'reliable' meant 'that may be relied on', and 'held' meant 'grasped or kept', evolving into the modern meaning of 'firmly believed or trusted'.