A descent.
"The descending path led us down to the river valley."
present participle and gerund of descend
"The descending flight path brought the plane closer to the runway."
In plain English: To go down from a higher place to a lower one.
"The plane began descending toward the runway after landing in thick fog."
coming down or downward
"The snow began descending from the mountain peaks to cover the valley floor."
Moving or sloping downwards.
"The winding road descended steeply into the valley below."
In plain English: Descending means going down from a higher place to a lower one.
"The descending stairs were too steep to climb safely without help."
The word descending is formed by adding the suffix -ing to the verb descend. It entered English from Latin through French, originally describing the action of moving downward or coming down.