frena
frena is a Latin form of frenum, meaning “bridle, bit, reins; restraint”. It is the accusative plural neuter noun or 2nd person singular present active imperative.
It can also be a form of freno, “bridle, curb, restrain”.
Found 103 times in the Latin texts on Socratos.
Where it is used
Vergil, Georgics 3.115: Frena Pelethronii Lapithae gyrosque dedere
All forms of frenum (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.