'urination' originates from Latin, specifically the word 'urinatio', where 'urina' meant 'urine' and the suffix '-ation' signified 'action or process'.

'urination' changed from Medieval/Late Latin 'urinatio' (from the verb 'urinare') and entered English via medical/learned usage, eventually becoming the modern English word 'urination'.

Initially, it meant 'the action of passing urine', and over time this core meaning has remained largely the same as the modern meaning 'the act or process of discharging urine'.