'aneurismatic' originates from the Greek word 'aneurysma', where 'ana-' meant 'up' and 'eurys' meant 'wide'.

'aneurysma' was adopted into Late Latin as 'aneurysma', then into French as 'anévrisme', and eventually became the English word 'aneurysm', from which 'aneurismatic' is derived as an adjective.

Initially, it referred specifically to the widening of a blood vessel, but now it is used more broadly to describe anything relating to or characteristic of an aneurysm.