obsidionem
obsidionem is a Latin form of obsidio, meaning “siege, blockade”. It is the accusative singular feminine noun.
Found 61 times in the Latin texts on Socratos.
Where it is used
Caesar, De Bello Gallico 5.49.1: Galli re cognita per exploratores obsidionem relinquunt, ad Caesarem omnibus copiis contendunt. Hae erant armata circiter milia LX.
All forms of obsidio (declension table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.