An invariable (indeclinable) word that means 'various kinds of' or 'many different kinds of'. It describes a colorful mixture of things or people.
example
Auf dem Jahrmarkt gab es Stände mit allerlei Leckereien.
At the fair, there were stalls with all kinds of treats.
Usage tips
Invariable adjective
'Allerlei' is an indeclinable word. That means it never gets an adjective ending, and its form always stays the same, no matter which noun it comes before.
EXAMPLE
Im Korb waren allerlei frische Früchte.
There were all kinds of fresh fruits in the basket.
Word structure
The word consists of 'aller' (a form of 'all') and the old ending '-lei', which means 'Art' (kind) or 'Sorte' (type). So 'Allerlei' literally means 'of all kinds'.
EXAMPLE
Auf dem Flohmarkt fand man allerlei alte Schätze.
At the flea market, you could find all kinds of old treasures.
Use with nouns
'Allerlei' always comes before a plural noun and is used without an article. It describes an unspecified but varied amount.
EXAMPLE
Die Kinder stellten im Unterricht allerlei Fragen.
The children asked all kinds of questions in class.
Compare with
synonym
allerlei vs möglich
possible
'alles Mögliche' and 'allerlei' both mean that there are many different things. This is not about 'möglich' in the sense of 'feasible', but about the fixed expression 'alles Mögliche' (all sorts of things). 'allerlei' usually comes directly before a noun, for example 'allerlei Fragen' (all kinds of questions). 'alles Mögliche' sounds a little more colloquial and can also stand on its own. Both fit well when you are not giving an exact list, but mean a varied mix.
allerlei
Beim Einkaufen hat er allerlei Sachen für das Abendessen mitgebracht.
While shopping, he brought back all kinds of things for dinner.
möglich
In der alten Kiste lagen Fotos, Briefe und alles Mögliche.
There were photos, letters, and all sorts of things in the old box.