quicksand

/K W IH1 K S AE0 N D/
noun
  1. 1

    Wet sand that things readily sink in, often found near rivers or coasts

    โ€œMy feet were firmly lodged in the quicksand, and the more I struggled the more I sank into it.โ€

  2. 2

    Anything that pulls one down or buries one metaphorically

    โ€œThe quicksands of youth...โ€

Source: https://en.wiktionary.org/wiki/quicksand