To rotate a point \((x, y)\) 90 degrees counterclockwise around the origin, the new coordinates can be determined using the formula:
\[ (x', y') = (-y, x) \]
For the point \((-4, -6)\):
- \(x' = -(-6) = 6\)
- \(y' = -4\)
So the new coordinates after rotation are \((6, -4)\).
Thus, the answer is:
\((6, -4)\)