ruinas
ruinas is a Latin form of ruina, meaning “fall, collapse; ruin, destruction; (pl.) ruins”. It is the accusative plural feminine noun.
Found 95 times in the Latin texts on Socratos.
Where it is used
Cicero, In Catilinam 1.14: … ri, ne in hac civitate tanti facinoris immanitas aut exstitisse aut non vindicata esse videatur. praetermitto ruinas fortunarum tuarum quas omnis proximis Idibus tibi impendere senties: ad illa venio quae non ad privatam ignom …
All forms of ruina (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.