sicheren
Sicheren is not a standalone lexical item in German, but the inflected form of the adjective sicher, meaning safe or secure. In German grammar, sicheren arises from the weak (or mixed) adjective declension when the adjective follows a determiner that marks the case, such as der, die, das or possessive determiners like mein, dein, and so on. In the plural, the weak ending -en is used in all cases, which produces the form sicheren in many contexts.
The primary use of sicheren is in plural noun phrases after definite determiners or possessives. For example:
In contrast to the plural form, the singular forms of sicher take different endings, such as sichere
Etymologically, sicheren derives from sicher, which traces back to the Germanic root meaning safety or certainty;