(heading, physical) To move or be moved into something.
(heading, social) To diminish or be diminished.
To conceal and appropriate.
To keep out of sight; to suppress; to ignore.
To pay absolutely.
I have sunk thousands of pounds into this project.
To reduce or extinguish by payment.
to sink the national debt
To be overwhelmed or depressed; to fail in strength.
To decrease in volume, as a river; to subside; to become diminished in volume or in apparent height.