Dictionarydeclinedownward change
verb / noun

decline

dih-KLYNE/dɪˈklaɪn/

a change to a lower or worse state

The plant declines as its leaves weaken and its size diminishes.

Three stages of the same potted plant becoming progressively weaker and smaller, declining condition.
Etymology

Originally expressing bending or turning away, decline acquired a downward emphasis as de- was interpreted as “down.” Sinking to a lower level also described becoming weaker or falling into a worse condition.

In context

Voice of America2:23
sectors that we have in nigeria now uh they actually decline they are not performing they are not actually you know lucrative
Nigerian Officials Worry as Citizens Flout Coronavirus Rules

More examples

  • Sales declined during the winter.
  • A steady decline worried the manager.
  • The service has been declining for months.

Forms

decline · declines · declined · declining

Similar words

deteriorate
Specifically describes worsening rather than every numerical decrease.
worsen
Worsen emphasizes reduced quality rather than a downward movement or trend.