Insouciant - free from concern, worry, or anxiety. Origin Insouciant entered English from French, based on the French verb soucier meaning "to worry." Ultimately it finds its roots in the Latin sollicitāre meaning "to disturb.
Natatorium - a swimming pool, especially one that is indoors. Origin: Natatorium stems from the Late Latin natātōrium meaning "swimming place," formed on the basis of the Latin verb natāre meaning "to swim." It entered English in the late