P / plăcĭdĭtas
noun

plăcĭdĭtas

gen. ātis · gender feminine · decl. 3rd
mildness; gentleness of nature; disposition
mildness, gentleness of nature or disposition, placidity (very rare): oves assumptas propter placiditatem, Varr. R. R. 2, 1; Auct. ap. Gell. 13, 22, 19.