'reliably-supplied' originates from the combination of 'reliable' and 'supply', where 'reliable' comes from the Latin word 'reliabilis', meaning 'that may be relied on', and 'supply' comes from the Latin word 'supplere', meaning 'to fill up'.

'reliable' changed from the Old French word 'reliable', and 'supply' evolved from the Old French word 'soupleer', eventually becoming the modern English words 'reliable' and 'supply'.

Initially, 'reliable' meant 'that may be relied on', and 'supply' meant 'to fill up'. Over time, 'reliably-supplied' evolved to mean 'consistently provided with necessary resources'.