διαμφότεροι

From LSJ

ὁ Σιμωνίδης τὴν μὲν ζωγραφίαν ποίησιν σιωπῶσαν προσαγορεύει, τὴν δὲ ποίησιν ζωγραφίαν λαλοῦσαν → Simonides relates that a picture is a silent poem, and a poem a speaking picture | Simonides, however, calls painting inarticulate poetry and poetry articulate painting

Source

Spanish (DGE)

-αι, -α ambos διαμφοτέροις τρόποις Amph.Or.1.47.