ἰσχυροπράγμων
From LSJ
ἀναπηδῆσαι πρὸς τὸν πάππον → jumped up on his grandfather's knees, sprang up into his grandfather's lap
English (LSJ)
ον, gen. ονος,
A doing mighty deeds, Paul.Al.O.1; gloss on ὀβριμοεργός, Sch.D Il.5.403.
German (Pape)
[Seite 1273] ονος, starke, muthige Thaten verrichtend, Erkl. von ὀβριμοεργός, Schol. Il. 5, 403.