'urine-promoting' originates from English, specifically a compound of 'urine' (from Latin 'urina') and 'promote' (from Latin 'promovere'), where 'urina' meant 'urine' and 'promovere' meant 'to move forward' (pro- 'forward' + movere 'to move').

'urine' entered English from Latin 'urina' (via Old French/Medieval Latin influences), and 'promote' came into English from Latin 'promovere' through Old French; the modern compound 'urine-promoting' was formed in English by combining these elements to describe substances that increase urine output.

Initially the components referred simply to 'urine' and 'to move/encourage'; combined in modern usage they specifically mean 'causing increased urination' (a medical/physiological sense).