ansteigend
rising
Describes something that leads upward or whose incline increases. It is often used for paths, roads, or terrain.
Der Weg zum Gipfel ist steil und ansteigend.
The path to the summit is steep and rising.

rising / increasing
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rising
Describes something that leads upward or whose incline increases. It is often used for paths, roads, or terrain.
Der Weg zum Gipfel ist steil und ansteigend.
The path to the summit is steep and rising.

'Ansteigend' (rising / increasing) is the present participle of the separable verb 'ansteigen' (to rise / to increase). The verb 'ansteigen' means that something becomes higher or increases, whether it is a path or a number.
Die Temperaturen steigen langsam an.
The temperatures are slowly rising.
You can recognize the meaning from the noun. If 'ansteigend' (rising / increasing) refers to something physical such as 'Straße' (road), 'Weg' (path), or 'Gelände' (terrain), it means an incline. If it refers to abstract things such as 'Preise' (prices), 'Zahlen' (numbers), 'Fieber' (fever), or 'Tendenz' (trend), it means an increase.
Wir folgten einem schmalen, ansteigenden Pfad durch den Wald.
We followed a narrow, rising path through the forest.
The word is often described more precisely by adverbs that indicate the extent of the incline or increase. Typical combinations are 'steil ansteigend' (steeply rising), 'leicht ansteigend' (slightly rising / increasing), 'stark ansteigend' (sharply increasing), or 'langsam ansteigend' (slowly rising / increasing).
Die Kurve der Infektionen ist nur noch leicht ansteigend.
The curve of infections is now only slightly increasing.
increasingly / waxing
'zunehmend' and 'ansteigend' can both describe an increase, for example in prices, numbers, or temperatures. 'zunehmend' says more generally: something is becoming more or stronger. 'ansteigend' fits especially well with measurable values that are going up, and also with paths or roads that lead uphill. Learners may confuse the words because both describe a positive direction. As a simple guide: for general developments, 'zunehmend' is often more natural; for numbers, curves, or slopes, 'ansteigend' is very appropriate.

Die ansteigenden Mieten machen vielen Familien Sorgen.
The rising rents are worrying many families.
Im Zug wird es zunehmend voller.
The train is getting increasingly crowded.