Erga | Dictionary of Greek and Roman Geography

erga
ergā, praep. [syncop. for e-regā, from ex and root rag-, to reach upward, be upright; cf. ergo, v. C...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
erga
ergā praep.with acc, towards, in respect of, in relation to: animis te erga, T.: vestra erga ...

An Elementary Latin Dictionary