stupendous
From LSJ
αἰθὴρ δ᾽ ἐλαφραῖς πτερύγων ῥιπαῖς ὑποσυρίζει (Aeschylus, Prometheus Bound 126) → The bright air fanned | whistles and shrills with rapid beat of wings.
adj.
Ar. and P. δαιμόνιος, θαυμάσιος, ὑπερφυής, P. and V. θαυμαστός, ἐξαίσιος (Plat.), ἀμήχανος, V. ἔκπαγλος.