na-adjective, noun
mellow and rich; full-bodied; superior
Primarily describes the flavor or fragrance of alcoholic beverages such as wine, sake, or whiskey. Can also be used for other foods or aromas that are deep, smooth, and well-rounded.
このワインは芳醇な香りがする。
This wine has a mellow, rich aroma.
芳醇な味わいの日本酒を楽しんだ。
I enjoyed a sake with a full-bodied flavor.
The kanji 芳 means 'fragrant' and 醇 means 'rich/pure (of alcohol)'. The combination is a Sino-Japanese compound (kango) that originally referred to the quality of fine liquor.