mendaciis
mendaciis is a Latin form of mendacium, meaning “lie, falsehood”. It is the ablative plural neuter noun or dative plural neuter noun.
Found 27 times in the Latin texts on Socratos.
Where it is used
Cicero, Letters to his Friends 3.10.7: te autem quibus mendaciis homines levissimi onerarunt! non modo sublatos sumptus, sed etiam a procuratoribus eorum, qui iam profecti es …
Plautus, Pseudolus 4.1.927: síc ego illúm dolis átque mendáciis
All forms of mendacium (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.