MultiTerm vs Termbase

I started learning Trados Studio 2022 on my own and have been using it for about a week now. I have understood almost all its main features, but some aspects are still unclear.

1. Termbase vs Multiterm? What is the relationship between these two? Is one an alternative to the other or do you use both at the same time?

2. Should my multiterm and termbase file be the same or should I create a separate file for each?

3. I am translating in three languages. Do I need to create a separate termbase file for each language match? Like this:

En-Tr

En-Ar

Ar-En

Ar-Tr

Tr-En

Tr-Ar

4. On Trados we can select a term from the source and target text and add it to the termbase. Is there a way to do the same for multiterm?

Thanks in advance

Translated with DeepL www.deepl.com/.../

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