sinking

US /ˈsɪŋ·kɪŋ/
1.

go down below the surface of something, especially of a liquid; become submerged.

:
•
he saw the coffin sink below the surface of the waves
:
go downdropfalldescenddisappearvanish
:
risefloat
2.

descend; drop.

:
•
you can relax on the veranda as the sun sinks
:
descenddropfallplungeplummetpitchnosediveset
:
ascendrise
1.
1.
:
sinksink insink or swimsomeone's heart sinkseverything but the kitchen sink