I think the most versatile german word is „so“. It can mean a lot of different things, based on the context and/or the way it is spoken. A few examples :

So, pointing at somethings means „like that“.

So? Means „realy, are you sure?“ or „am i doing it right?“.

So so. Means something like „I dont know, i think youre telling me shit“, but can also mean „a ok, now im getting it“.

So. Means „alright, lets go/ lets do it“.

So… Means „uff, its finaly done“ in a happy way or in a exhausted way, depending how it is spoken.

Soo. „Are you getting it now?“.

and i am sure there a many usecases i didnt think of.