ἀνθ

From LSJ

ἤκουσεν ἐν Ῥώμῃ καὶ ἀρσένων ἑταιρίαν εἶναι → he heard that there was also a fellowship of males in Rome (Severius, commentary on Romans 1:27)

Source

Russian (Dvoretsky)

ἀνθ:
I приставка ἀντ- перед гласным с густым придыханием.
II в сложн. словах = ἄνθος I.