noun
person who longs for something; desirer; luster
A somewhat literary or formal noun for someone who intensely desires or craves something. 'Luster' is an archaic or rare sense; modern usage focuses on strong longing.
彼は真実の渇望者だ。
He is a seeker of truth.
権力の渇望者は決して満足しない。
A luster after power is never satisfied.