at a loss

From LSJ

ἔργον δὲ καλὸν οὔτε θεῖον οὔτ ̓ ἀνθρώπειον χωρὶς ἐμοῦ γίγνεται → there is no fine work of man or god without me

Source

English > Greek (Woodhouse Extra)

ἄπορος, ἀμήχανος