The infinitive is added, like an accusative of respect ( cross1601, cross1602), to intransitive verbs (especially in poetry), to adjectives (more frequently in poetry), and to substantives (rarely). Thus, τοῖος ἰδεῖν
σαι παγκάλως ἔχει
θαῦμα καὶ ἀκοῦσαι
Herbert Weir Smyth [n.d.], A Greek Grammar for Colleges; Machine readable text [info] [word count] [Smyth].