gebundener
Gebundener is a German adjective form derived from the past participle gebunden of the verb binden, meaning bound, tied, or constrained. As a grammatical form it is the masculine nominative singular ending used with a determiner or in strong declension, for example in the phrase ein gebundener Mann. The term can also appear in other declined forms depending on gender, number, and case (gebundene, gebundenes, gebundenen, etc.).
In ordinary usage, gebunden describes something that is physically tied or secured, but it is also used
In specialized domains, gebunden or gebundener appears in established terms. In physics and chemistry, gebundene Zustände
Etymology outside of grammar is straightforward: gebunden comes from binden, with the participial suffix -en forming