Treibsand

Etymology
From, (both Central German, 14th c.). Like all High German attestations before the 16th century, these seem to be equivalent to modern 🇰🇲, which is notable because 🇨🇬 was commonly used of the driving of livestock only. Hence, possibly from (15th c., could be ),  (16th c.), from  (compare unambiguous 🇨🇬,, 16th c.). A borrowing from Low German may also be corroborated by the semantic context, though neither silt nor quicksand are restricted to seashores. The modern form with -ei- by adaptation to underlying (also in contemporary 🇨🇬, 🇨🇬).

Noun

 * 1) quicksand
 * 2)  silt