'gallbladder' originates from Old English, specifically the words 'galla' meaning 'bile' and 'blædre' meaning 'bladder'. 'Related' comes from Latin 'relatus', the past participle of 'referre', meaning 'to bring back'.

'Gallbladder' changed from the Old English word 'gallblædre' and eventually became the modern English word 'gallbladder'. 'Related' evolved from the Latin 'relatus' through Old French 'relater', and eventually became the modern English word 'related'.

Initially, 'gallbladder' meant 'bile bladder', and this meaning has largely remained the same in modern usage. 'Related' initially meant 'brought back' and evolved to mean 'connected or associated'.