sink
verb
uk/sɪŋk/ ussank | sunk [ I ]
if prices, profits, shares, etc. sink, they fall to a lower level:
Bond prices sank and stocks rose today.
sink to sth The dollar sank to a record low against the euro.
Shares sank 3% Wednesday to close at $39.35.
[ I or T ]
to go under, or cause something to go under, the surface of the water:
The tanker sank off the coast of Alaska.
The explosion sank the ship in 300 feet of water.
Phrasal verb
sink sth into sth