
abwechselnd
alternating
Following one after another in a regular alternation; first one thing, then the other.
Die beiden Brüder übernahmen abwechselnd die Pflege ihrer kranken Mutter.
The two brothers took turns caring for their sick mother.
alternating / varied
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alternating
Following one after another in a regular alternation; first one thing, then the other.
Die beiden Brüder übernahmen abwechselnd die Pflege ihrer kranken Mutter.
The two brothers took turns caring for their sick mother.

varied
Providing variety and variation; not monotonous.
Das Festival bot ein abwechselndes Programm aus Musik, Theater und Kunst.
The festival offered a varied program of music, theater, and art.
The word 'abwechselnd' (alternating/varied) comes from the verb 'wechseln' (to change/switch). It describes an action in which two or more things or people switch places or roles, meaning one comes after the other.
Wir können uns beim Fahren abwechseln.
We can take turns driving.
'Abwechselnd' (alternating/varied) can be used as an adverb to describe how an action is carried out. But it can also stand before a noun as an adjective and is then declined like any other adjective.
Die Kinder spielten abwechselnd mit dem Ball.
The children played with the ball in turns.
When 'abwechselnd' (alternating) describes an order or sequence, it often refers to two opposite or different states or actions. These are frequently connected with 'und' (and).
Das Wetter war abwechselnd sonnig und bewölkt.
The weather was alternating between sunny and cloudy.
In the meaning 'vielfältig' (varied), 'abwechselnd' (varied) often describes abstract nouns. Typical combinations are 'ein abwechselndes Programm' (a varied program), 'eine abwechselnde Ernährung' (a varied diet), or 'eine abwechselnde Landschaft' (a varied landscape).
Für eine gute Gesundheit ist eine abwechselnde Ernährung wichtig.
A varied diet is important for good health.
changing / alternating
Both words describe something that does not always remain the same. „Abwechselnd“ indicates a regular alternation between clearly defined elements, while „wechselnd“ can also mean a simple change or different forms without a fixed order. For a fixed back-and-forth pattern, „abwechselnd“ is therefore the better choice.

Anna und Ben tragen die Kisten abwechselnd ins Lager.
Anna and Ben take the boxes to the storage room in turns.
Die Aufgaben im Ferienprogramm sind wechselnd und bleiben nicht gleich.
The activities in the vacation program keep changing and do not remain the same.