渥然 is read as あくぜん (akuzen) and means glossy.
あくぜん
akuzen
せきぜん
forlornness
ばくぜん
vague
かんぜん
boldly
そうぜん
noisy
せいぜん
orderly
げんぜん
grave
たいぜん
calm
むいしぜん
abandoning artifice and just being oneself
あんぜん
こうぜん
elated
sweetly smiling
さんぜん
brilliant