Renal.
"renal" is the medical word for something having to do with the kidneys. So internal renal bleeding means bleeding in the kidneys.
Quadrinephric means having four kidneys.
Our crack team of specialists thinks it means "related to kidneys".
NEPHRO, NEPHR - it means something related to the kidneys
Nephric relates to kidneys and tri is 3 so I guess it's having 3 kidneys?
Gubernatorial is a word that means having to do with a governor.
It means having to do with excretion.
regarding
"Expertise" is a word that means having specialized knowledge in a specific field or subject.
Costal. This word should not be confused with "coastal" which means on the coast.
"Vigor" is a word that means having a lot of energy or enthusiasm.
Military