placidis
placidis is a Latin form of placidus, meaning “calm, peaceful, gentle”. It is the ablative plural neuter adjective or ablative plural feminine adjective.
Found 35 times in the Latin texts on Socratos.
Where it is used
Vergil, Aeneid 6.371: sedibus ut saltem placidis in morte quiescam.
All forms of placidus (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.