ein andermal
another time
Refers to an unspecified point in the future; not now, but later.
Ich habe jetzt keine Zeit, lass uns das ein andermal besprechen.
I don't have time right now; let's discuss that another time.

another time
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another time
Refers to an unspecified point in the future; not now, but later.
Ich habe jetzt keine Zeit, lass uns das ein andermal besprechen.
I don't have time right now; let's discuss that another time.

This adverb is almost always used in the fixed expression 'ein andermal' (another time). It means 'at another, later point in time.'
Können wir das vielleicht ein andermal machen? Ich bin gerade sehr beschäftigt.
Can we maybe do that another time? I'm very busy right now.
The word is made up of 'ander' (other) and 'Mal' (time/occasion, in the sense of a point in time). Literally, 'ein andermal' means 'another time.'
Heute schaffe ich es nicht mehr, aber wir können uns gern ein andermal treffen.
I can't manage it today anymore, but we can gladly meet another time.
As a time expression, 'ein andermal' (another time) can stand flexibly in a sentence, often at the beginning for emphasis or after the verb in the middle field.
Ein andermal erzähle ich dir die ganze Geschichte.
Another time, I'll tell you the whole story.
now
'jetzt' and 'andermal' are opposites in terms of time. 'jetzt' means the current moment: something happens immediately or right in this situation. 'andermal', on the other hand, means: not now, but at a later, not yet exactly specified time. The difference is especially important in responses to invitations or suggestions. 'Jetzt' fits when you want to do something right away. 'Ein andermal' fits when you want to postpone it.

Heute bin ich zu müde für einen Spaziergang, das machen wir ein andermal.
I'm too tired for a walk today; we'll do that another time.
Nach dem Unterricht gehe ich jetzt direkt nach Hause.
After class, I'm going straight home now.