custodiae
custodiae is a Latin form of custodia, meaning “guard, custody, protection; prison; guards”. It is the genitive singular feminine noun.
Found 70 times in the Latin texts on Socratos.
Where it is used
Caesar, De Bello Gallico 2.29.4: Ipsi erant ex Cimbris Teutonisque prognati, qui, cum iter in provinciam nostram atque Italiam; facerent, iis impedimentis quae secum agere ac portare non poterant citra flumen Rhenum depositis custodiae [ex suis] ac praesidio VI milia hominum una reliquerant.
All forms of custodia (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.