συμμαχέομαι

From LSJ

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

German (Pape)

[Seite 980] ion. statt συμμάχομαι, τινί, Her. τὸ οἰκός μοι συμμαχέεται, 7, 239.