liû-sa流沙

loose sand in a desert

loose sand in a desert; sand forming dunes; quicksand; wet sand that things readily sink in

English Wiktionary, “流沙” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E6%B5%81%E6%B2%99 · confidence: Medium (Wiktionary, Hokkien)