ῥαγδαῖον

From LSJ

Αὐρήλιοι... πατρὶ... καὶ μητρὶ... μνήμης χάριν → The Aurelii, in memory of their father and mother (inscription from Aizonai, Phrygia)

Source

Russian (Dvoretsky)

ῥαγδαῖον: τό быстрота, стремительность, напор, натиск Plut.