octogesimus

ὄρνιθι γὰρ καὶ τὴν τότ᾽ αἰσίῳ τύχην παρέσχες ἡμῖν → for it was by a good omen that you provided that past fortune to us

Latin > English (Lewis & Short)

octōgēsĭmus: a, um,
I num. ord. adj. octoginta, the eightieth: quartum annum ago et octogesimum, Cic. Sen. 10, 32; 2, 4: solstitia, Juv. 4, 92.