feri
feri is a Latin form of ferus, meaning “wild, savage; (fera, f.) wild animal, beast”.
It can also be a form of ferio, “strike, hit; kill; (foedus ferire) make a treaty”. It is the 2nd person singular present active imperative.
Found 55 times in the Latin texts on Socratos.
Where it is used
Caesar, De Bello Gallico 1.31.5: Horum primo circiter milia XV Rhenum transisse; postea quam agros et cultum et copias Gallorum homines feri ac barbari adamassent, traductos plures; nunc esse in Gallia ad C et XX milium numerum.
Plautus, Casina 2.6.407: Feri malam, ut ille, rursum.
All forms of ferus (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.