Strong’s Greek
G4950 — surtis
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
∑ύρτις
surtis — pronounced soor'-tis
from 4951; a shoal (from the sand drawn thither by the waves), i.e. the Syrtis Major or great bay on the north coast of Africa:--quicksands. see GREEK for 4951
1 occurrence in the KJV.
Acts 27:17
Which when they had taken up, they used helps, undergirding the ship; and, fearing lest they should fall into the quicksands, strake sail, and so were driven.