συμπορθέω
From LSJ
τὸ λακωνίζειν πολὺ μᾶλλόν ἐστιν φιλοσοφεῖν ἢ φιλογυμναστεῖν → to behave like a Lacedaemonian is much more to love wisdom than to love gymnastics (Plato, Protagoras 342e6)
English (LSJ)
A help to destroy or sack, ος σῷ πατρὶ συνεπόρθει Φρύγας E.Or.888, cf. BCH21.599 (Delph., iv B.C.); οἱ συμπεπορθημένοι involved in like ruin, Str.8.3.29.