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.

'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.
increase / rise
'die Erhöhung' and 'die Senkung' are opposites when it comes to values, prices, or amounts. An 'Erhöhung' makes something higher or larger; a 'Senkung' makes something lower or smaller. Typical examples are rents, costs, taxes, or temperatures. The words are also opposites in terrain: an 'Erhöhung' is a higher spot, while a 'Senkung' is a lower spot. In everyday language, however, they are usually about numbers or costs.

Die Firma plant eine Senkung der Kosten, weil sie sparen muss.
The company is planning a reduction in costs because it needs to save money.
Im Supermarkt bemerken viele Kunden die Erhöhung der Preise.
In the supermarket, many customers notice the increase in prices.