acerrimo

acerrimo is a Latin form of acer, meaning “sharp, keen, fierce”. It is the ablative singular feminine superlative noun or dative singular feminine superlative noun.

Found 30 times in the Latin texts on Socratos.

Where it is used

Cicero, Pro S. Roscio Amerino 85: … oni vir et contra audaciam fortissimus et ab innocentia clementissimus, tamen facile me paterer vel illo ipso acerrimo iudice quaerente vel apud Cassianos iudices, quorum etiam nunc ei quibus causa dicenda est nomen ipsum reform …

All forms of acer (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.