συγκατεργάζομαι

A. help or assist any one in achieving, τῷ Κύρῳ τὴν βασιληΐην Hdt. 1.162, cf. E. Or. 33; τὸ πᾶν ξ. Th. 1.132: c. dat. only, aid, assist, Hdt. 2.154, 8.142.

2. help to conquer a country, Plu. Pyrrh. 18.

3. join in murdering, E. HF 1024 (lyr.).