'reliably-directed' originates from the combination of 'reliable' and 'directed', where 'reliable' comes from the Latin 'reliabilis', meaning 'that may be relied on', and 'directed' from the Latin 'directus', meaning 'straight, direct'.

'reliable' changed from the Old French word 'reliable', and 'directed' from the Old French 'directer', eventually becoming the modern English words 'reliable' and 'directed'.

Initially, 'reliable' meant 'that may be relied on', and 'directed' meant 'guided or managed', which have largely remained the same in modern usage.