prō-gnārĭter

I. very skilfully, very expertly (ante-class.): prognariter armis Certare, Enn. ap. Non. 150, 6 (Ann. v. 215 Vahl.): age, indica prognariter, Plaut. Pers. 4, 4, 39 Ritschl N. cr.; cf. Non. 150, 4, and 154, 30.