Origin: Latin suffix -ate
Prostate has 5 different meanings across 2 categories:
a firm partly muscular chestnut sized gland in males at the neck of the urethra; produces a viscid secretion that is the fluid part of semen
"The doctor explained that his enlarged prostate was interfering with urine flow and potentially affecting the quality of his seminal fluid."
The prostate gland.
"The doctor performed an examination to check if his enlarged prostate was causing urinary problems."
Of or relating to the prostate gland.
"The term appears in older texts as an alternative spelling of pro-state, though it is no longer commonly used."
Alternative spelling of pro-state
In plain English: There is no adjective form of prostate because it is only used as a noun to name the small gland found at the base of your bladder.
"The prostate did not function well after his surgery."
The word entered English via Middle French and Medieval Latin from the Ancient Greek prostátēs, which originally meant "one who stands before" or a protector. It was later applied to the gland because it sits in front of the bladder, acting as a guardian for the urinary tract.