zuweilen
at times
Sometimes, occasionally. It is a somewhat elevated or more formal alternative to 'manchmal' (sometimes).
Zuweilen gehe ich nach der Arbeit noch im Park spazieren.
At times, I go for a walk in the park after work.

at times
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at times
Sometimes, occasionally. It is a somewhat elevated or more formal alternative to 'manchmal' (sometimes).
Zuweilen gehe ich nach der Arbeit noch im Park spazieren.
At times, I go for a walk in the park after work.

The word is made up of 'zu' and 'Weilen'. 'Eine Weile' means 'for a while'. So 'zuweilen' literally means 'at times' or 'sometimes'.
Er fühlt sich zuweilen etwas einsam in der neuen Stadt.
At times, he feels a bit lonely in the new city.
As an adverb, 'zuweilen' can stand in position 1; then the verb follows in position 2. But it can also stand after the conjugated verb in the middle of the sentence.
Zuweilen scheint die Sonne auch im Winter sehr stark.
At times, the sun shines very strongly even in winter.
'Zuweilen' (at times) belongs to elevated language. You find it more often in written texts, such as literature or reports, than in everyday spoken language.
Der Autor verwendet zuweilen sehr komplexe Satzstrukturen.
The author uses very complex sentence structures at times.
always
'immer' and 'zuweilen' both describe frequency, but they say almost the opposite. 'immer' means that something happens every time or constantly. 'zuweilen' means that something happens only sometimes. 'zuweilen' sounds somewhat more elevated or formal than 'manchmal' (sometimes). In everyday life, people often say 'manchmal'; in a report or a calmer text, 'zuweilen' can fit well.

Auf Reisen hat sie zuweilen Heimweh.
When traveling, she sometimes gets homesick.
Bei starkem Regen nehme ich immer den Bus.
When it rains heavily, I always take the bus.