ἀγνωστί
From LSJ
Τραφὲν ὄρεσι καὶ φάραγξιν ἀγρίαις, κήρυξ πέφυκα τῆς λόγου ὑμνῳδίας. Φωνήν μὲν οὐκ ἔναρθρον, εὔηχον δ' ἔχω (Byzantine riddle) → Raised in the mountains and wild ravines, I have become the herald of hymns that are sung. I have no articulate voice...
English (LSJ)
Adv. secretly, unperceived, Ps.-Callisth.3.19.
Spanish (DGE)
adv. secretamente, a escondidas Ps.Callisth.116.23, Choerob. en Theodos.Gr.Sp.231 (ἀγνωϊστί cód.).