praesidii
praesidii is a Latin form of praesidium, meaning “garrison, protection”. It is the genitive singular neuter noun.
Found 109 times in the Latin texts on Socratos.
Where it is used
Caesar, De Bello Gallico 3.23.7: … vertit, suas copias propter exiguitatem non facile diduci, hostem et vagari et vias obsidere et castris satis praesidii relinquere, ob eam causam minus commode frumentum commeatumque sibi supportari, in dies hostium numerum auger …
All forms of praesidium (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.