Meanings
also, too, as well (in addition to whatever or whoever has previously been listed)
Ich will auch ein Eis.Stress on “auch”: I too want an ice cream.
To confirm a preceding statement by someone else: really, actually, indeed, in fact
Ich will auch ein Eis.Stress on “will”: I do indeed want an ice cream.
To ask for confirmation of something one considers necessary.
Hast du das Licht auch ausgemacht?Did you make sure to turn off the light?
To imply that something is unreasonable.
Du bist auch witzig... Wie soll ich das denn ohne Auto alles schaffen?!You’re oh so ingenious... How am I supposed to get all of this done without the car?!
even (implying an extreme example in the case mentioned, as compared to the implied reality)
Auch wenn das stimmt, ist es noch kein endgültiger Beweis.Even if this is true, it is no definite proof.
ever as in whatever, whenever, however, etc.
Was du auch tust, es wird immer einer besser sein.Whatever you do, someone will always do it better.
2 more meanings
also; too; as well; item
Er machte es auch so wie die Anderen.
Interjection
in answering a yes-no question, used to express that the thing asked about covers part of the truth but not all of it; “yes, and more”
Ach, du bist Bauingenieur. Dann baust du Brücken? — Auch.Oh, you’re a construction engineer. So you build bridges? — Yeah. And other things, too.