szerekben
Szerekben is the locative plural form of the Hungarian noun szer, a word with several related meanings. The two most common senses are "tool, instrument" and "drug, medicine, chemical substance." Therefore, szerekben can mean "in the tools/instruments" or "in the drugs/substances," depending on the context.
Grammatical notes: szerekben is formed by taking the plural szerek (tools or substances) and adding the locative
Usage: In everyday language, the sense is usually determined by context. When discussing workshop settings, szerekben
See also: Hungarian noun szer, locative case, plural forms, terminology in pharmacology and chemistry.