silly
The German word "albern" is used to describe something or someone as being silly or foolish. It can be used in a similar way to the English word "silly", such as "Du bist albern" (You are silly). It can also be used to describe an action as being silly, such as "Das ist eine alberne Idee" (That is a silly idea).
Your jokes are silly.
In this sentence, 'albern' is used as an adjective to describe the silliness of someone's jokes. The adjective 'albern' is synonymous to 'silly' or 'foolish' in English. The use of 'albern' gives the nuance that the jokes are not just funny, but they are of a foolish or mindless nature.
It's silly not to try that.
Here, 'albern' is used to express that an action (not trying something) is foolish or silly. This sentence can be said to someone in a context where you want to encourage them to try something new because avoiding it is silly or irrational.
I think it's silly that he's still upset.
In this example, 'albern' is employed to state an opinion about someone else's behavior (being still upset) as being silly or unnecessary. When used in such context, it shows the speaker's disbelief or criticism towards the other person's prolonged anger.