minaciter
minaciter is a Latin form of minax, meaning “threatening”. It is the adjective.
Found 25 times in the Latin texts on Socratos.
Where it is used
Cicero, Letters to his Friends 11.3.3: … minantis auctoritas apud liberos est; sed pulchre intellegis non posse nos quoquam impelli et fortassis ea re minaciter agis ut iudicium nostrum metus videatur.
All forms of minax (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.