feddhetetlenséget

feddhetetlenséget is a Hungarian noun that literally translates to “lack of coverability” or “inability to be covered.” It is primarily used to describe a property of materials or media that allows energy or information to pass through or be observed without obstruction. In physics, the term is applied to substances that are transparent or semi‑transparent to certain wavelengths of light, such as glass or specific polymers. In this sense, feddhetetlenséget is equivalent to the English notion of transparency or optical permeability. In information security, the term can denote the clarity of data channels or the vulnerability of systems to intrusion, where a system described as feddhetetlenséges is one that does not conceal its internal state or communications from an external observer. Historically, the word appears in discussions of material science literature as early as the 1930s, and it is sometimes employed in legal contexts to indicate the lack of a cover or concealment between parties. Though not commonly encountered in everyday Hungarian conversation, feddhetetlenséget frequently appears in technical texts, academic papers, and specialized dictionaries where precise terminology is required. The concept is related to several other terms in Hungarian, such as “áteresztő” (transmissive) and “féleléti” (opaque), which help situate it within the broader vocabulary of optical and informational properties.