zehnfach
tenfold
Describes that something exists or happens in ten times the amount, number, or intensity.
Durch die neue Linse wird das Bild zehnfach vergrößert.
The new lens magnifies the image tenfold.

tenfold
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tenfold
Describes that something exists or happens in ten times the amount, number, or intensity.
Durch die neue Linse wird das Bild zehnfach vergrößert.
The new lens magnifies the image tenfold.

The word consists of the number 'zehn' (ten) and the suffix '-fach'. This suffix means '-times' or '-fold' and can be combined with many other numbers to express multiplication, for example 'zweifach' (double/twofold), 'dreifach' (triple/threefold), or 'hundertfach' (a hundredfold).
Bitte machen Sie von diesem Dokument eine dreifache Kopie.
Please make three copies of this document.
'Zehnfach' (tenfold) can stand before a noun as an adjective and is then declined. It can also be used as an adverb to modify a verb, and then it remains unchanged.
Er forderte den zehnfachen Preis für das Produkt.
He demanded ten times the price for the product.
Common combinations are 'die zehnfache Menge' (ten times the amount), 'der zehnfache Wert' (ten times the value), or verbs like 'etwas zehnfach vergrößern' (to magnify something tenfold) or 'etwas zehnfach zurückbekommen' (to get something back tenfold).
Für seine Hilfe erhielt er den Lohn zehnfach zurück.
For his help, he received the reward back tenfold.
simple / just
'einfach' and 'zehnfach' can act like opposites in quantity expressions. In this context, 'einfach' means: only once or in a single amount. 'zehnfach', by contrast, means: ten times as much or with tenfold strength. The words can be confusing because both end in '-fach'. The context is important: when talking about difficulty, 'einfach' means not complicated; when talking about quantity, it stands in contrast to words like 'zehnfach'.

Nach dem Bericht stieg die Zahl der Anfragen fast zehnfach.
According to the report, the number of inquiries increased almost tenfold.
Für das Rezept reicht die einfache Menge, weil nur zwei Personen mitessen.
For the recipe, the single quantity is enough because only two people are eating.