osvdených
Osvdenných is a diacritics-free form that appears to correspond to the Czech and Slovak adjective osvědčených, the genitive plural of osvědčený. In standard usage, this diacritics-bearing form exists as part of a larger inflectional system: osvědčený (proven, verified, trusted), with osvědčených functioning as the genitive plural in phrases such as “kvalita osvědčených postupů.” The form osvdenných itself is not a recognized headword in standard dictionaries and is likely a typographical error or a non-diacritic rendering of a related form.
Etymology and meaning: osvědčený derives from the verb osvědčit, meaning to certify, verify, or prove, itself related
Usage context: osvědčených appears in technical, legal, or quality-control language to describe proven or certified items,