'entombment' originates from Middle English, specifically the word 'entoumben,' where 'en-' meant 'in' and 'tomb' referred to a 'grave or burial place.'

'entoumben' transformed into the modern English word 'entombment' through the influence of Old French 'entomber.'

Initially, it meant 'to place in a tomb,' and this meaning has largely remained the same in modern usage.