しずshizumu
1.

To descend or move downwards, particularly in water, resulting in an object being below the surface and potentially resting on the bottom.

2.

To enter a state of feeling low or dispirited, often characterized by a lack of energy or optimism, such as when one is troubled by sorrow or anxiety.

3.

To experience a decline in status or fortune, suggesting a fall from a more favorable position into a less desirable or marginalized situation.

4.

To gradually fade from visibility or prominence, becoming indistinct against the surrounding environment or background.

5.

To settle into a subdued or muted color or tone over time, particularly in the context of dye or pigment becoming more deep and rich.

Example:

まるで、沈む船から逃げるネズミみたいね。