This wine has been cellared underground for twenty years.
Tips
memory
穴 (cave/pit radical) on top + 告 (gào, phonetic) below. The cave-radical signals an underground pit; the reading shifted from gào to jiào. Common compounds: 地窖 dìjiào (cellar), 冰窖 bīngjiào (ice cellar), 红薯窖 hóngshǔjiào (sweet-potato pit).
