
allerhand
all sorts
A large amount or variety of different things; many kinds. This word is not declined.
Auf ihrer Reise hat sie allerhand erlebt.
On her trip, she experienced all sorts of things.
all sorts / quite a lot
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all sorts
A large amount or variety of different things; many kinds. This word is not declined.
Auf ihrer Reise hat sie allerhand erlebt.
On her trip, she experienced all sorts of things.

quite something
Used colloquially as an expression of outrage or surprise; outrageous, unbelievable.
Dass er das Treffen einfach vergessen hat, ist doch allerhand!
That he simply forgot the meeting is really quite something!
The word is made up of 'aller' (from alle, all) and 'Hand' (hand). The original idea is a 'handful of everything,' which explains the meaning 'many different things' well.
Auf dem Markt gab es allerhand exotische Früchte zu kaufen.
At the market, there were all sorts of exotic fruits to buy.
'Allerhand' (all sorts / quite a lot) is an adjective with a special feature: it is never declined and always keeps its base form, no matter which noun it comes before or which case it is in.
Wir haben mit allerhand Problemen zu kämpfen.
We have to deal with all sorts of problems.
In the colloquial meaning 'unerhört' (outrageous), 'allerhand' often stands alone or with 'sein' (to be) as a short exclamation of surprise or outrage.
Zuerst kommt er zu spät und dann hat er die Unterlagen vergessen. Das ist wirklich allerhand!
First he arrives late, and then he forgot the documents. That is really quite something!
incredible
Unglaublich and allerhand can both express astonishment or outrage about something. Allerhand is used colloquially as a fixed reaction, especially in “Das ist allerhand!” Unglaublich describes more directly that something is extraordinary and hard to believe.

Dass der Nachbar schon wieder nachts laut bohrt, ist allerhand!
The fact that the neighbor is drilling loudly again at night is quite something!
Es ist unglaublich, dass der Nachbar schon wieder nachts laut bohrt.
It is incredible that the neighbor is drilling loudly again at night.