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

Source

Spanish

atentamente, obstinadamente, pertinazmente, tenazmente

Russian (Dvoretsky)

ἀτενῶς: Diod., Plut. = ἀτενές.