'non-submersible' originates from the prefix 'non-' meaning 'not' and the word 'submersible' which comes from Latin 'submersibilis', where 'sub-' meant 'under' and 'mergere' meant 'to dip or plunge'.

'submersibilis' transformed into the French word 'submersible', and eventually became the modern English word 'submersible'. The prefix 'non-' was added to form 'non-submersible'.

Initially, 'submersible' meant 'capable of being submerged', but with the prefix 'non-', it evolved to mean 'not capable of being submerged'.