sinking

definition: a slow fall or decline (as for lack of strength)
example: after several hours of sinking an unexpected rally rescued the market
speech part: noun
synonyms:
definition: a descent as through liquid, especially through water
example: they still talk about the sinking of the Titanic
speech part: noun
synonyms:
definition: a feeling caused by uneasiness or apprehension
example: with a sinking heart
speech part: noun
synonyms: sinking feeling

How sinking is being used?