ἀτενῶς
From LSJ
Ῥῦσέ με δεινῶν νοσημάτων, ἱερώτατε, ἱερωσύνην συναρμόσας ἐν χαρᾷ και ἐπιστήμης τὸ πολύτιμον κεφάλαιον → Deliver me from grievous afflictions, most holy one, joining sanctity together in joy with the precious fountainhead of knowledge
Spanish
atentamente, obstinadamente, pertinazmente, tenazmente
Russian (Dvoretsky)
ἀτενῶς: Diod., Plut. = ἀτενές.