Descending
Descend.
The opposite is descend (go down the stairs).
The opposite is "descend" (go down).
Fall-Rise Descend- Ascend
The antonym (opposite)m is descend. (go down)
The opposite of climb (ascend) would be descend. However, for some type of increase (climb, rise), the opposite would be drop or fall.
The likely word sought is ascend (go upward), the opposite of descend.
The opposite of the noun descendant (offspring) would be ancestor or forebear. The opposite of the adjective descendant is ascendant.
I had to ascend the stairs to the next floor.
The opposite of plunge would be to soar (rapidly ascend or rise).In US football, the opposite of plunge (run into the line) is to go wide (run outside the tackles).
Depth
The balloon will ascend into the sky.