To rotate a point \((x, y)\) counterclockwise about the origin by \(180\) degrees, you can use the following transformation:
\[ (x, y) \rightarrow (-x, -y) \]
For the given point \((-6, 4)\):
- We apply the transformation: \[ (-6, 4) \rightarrow (6, -4) \]
Thus, the new point after rotating \((-6, 4)\) counterclockwise about the origin by \(180\) degrees is \((6, -4)\).