fszerekben
fszerekben is not a recognized standard form in Hungarian. It is almost certainly a misspelling of szerszerekben, which means “in the tools.” The word szerszerek is the plural of szerszám, i.e., tools or implements, and the suffix -ben marks the locative case, indicating location inside or within something. Therefore szerszerekben literally means “in the tools” or “inside the tools,” depending on context. This construction is common in workshop, maintenance, and inventory language, where distinguishing location within a toolbox, case, or set of tools is relevant.
In use, szerszerekben can describe objects or conditions located among or inside tools. For example, “A csavarhúzók
Notes for writers and editors: if you encounter fszerekben, check the surrounding text for the intended meaning.
See also: Hungarian grammar, locative case, noun plurals, orthography.