From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
pass water /pˈas wˈɔːtə/
urinieren, harnen [med.] , Harn lassen, Wasser lassen <v, intr>, sich erleichtern <v, refl> [euphem.] [med.]
Synonyms: urinate, micturate
see: urinating, passing water, micturating, urinated, passed water, micturated, urinates, micturates, urinated, micturated, discharge red/brown urine