
die Senkung
reduction / lowering
The reduction or lowering of something, especially prices, costs, temperatures, or values.
Die Supermärkte kündigten eine Senkung der Butterpreise an.
The supermarkets announced a reduction in butter prices.
reduction / lowering
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reduction / lowering
The reduction or lowering of something, especially prices, costs, temperatures, or values.
Die Supermärkte kündigten eine Senkung der Butterpreise an.
The supermarkets announced a reduction in butter prices.

depression / dip
A depression in the terrain; a place that is lower than the surrounding area.
In der Senkung zwischen den Hügeln hat sich ein kleiner See gebildet.
A small lake has formed in the depression between the hills.

sinking / ESR
In medicine, the pathological sinking of an organ. Colloquially also used as a short form for the erythrocyte sedimentation rate, a value in a blood test.
Der Arzt sagte, die erhöhte Senkung deute auf eine Entzündung im Körper hin.
The doctor said the elevated ESR indicated inflammation in the body.
'Die Senkung' (the reduction/lowering) is a noun derived from the verb 'senken' (to lower something). The ending '-ung' makes the word feminine and describes the process or result of lowering.
Die Firma plant, die Produktionskosten zu senken.
The company plans to lower production costs.
In an economic context, 'Senkung' (reduction/lowering) is often used in compounds such as 'Preissenkung' (price reduction), 'Kostensenkung' (cost reduction), or 'Steuersenkung' (tax cut). Alternatively, a genitive construction is used: 'die Senkung der Preise' (the reduction of prices).
Die Regierung diskutiert eine mögliche Steuersenkung.
The government is discussing a possible tax cut.
You can recognize the geographical meaning from words that describe a landscape. If 'Hügeln' (hills), 'Tal' (valley), or 'Gelände' (terrain) are mentioned, it means a depression in the ground.
Das Dorf liegt geschützt in einer natürlichen Senkung.
The village lies sheltered in a natural depression.
The medical meaning is usually clear from the context. Words like 'Arzt' (doctor), 'Blutwerte' (blood values), 'Entzündung' (inflammation), or 'erhöht' (elevated) indicate that it is about a medical finding.
Meine Blutwerte sind gut, nur die Senkung ist leicht erhöht.
My blood values are good; only the ESR is slightly elevated.
decline / receding
A Rückgang describes an observed negative development, for example when prices become lower over a period of time. A Senkung, by contrast, emphasizes that someone deliberately lowers prices, costs, or values. When talking about a development, “Rückgang” is appropriate; for a measure, “Senkung” is more suitable.

Die Senkung der Preise soll mehr Kunden anlocken.
The price reduction is intended to attract more customers.
Der Rückgang der Preise war in den letzten Monaten deutlich.
The decline in prices was significant over the past few months.