To rotate a point \((x, y)\) 90 degrees clockwise about the origin, you can use the following transformation formula:
\[ (x, y) \to (y, -x) \]
Applying this to the point \((-4, -6)\):
- \(x = -4\) and \(y = -6\)
- Substitute into the transformation:
\[ (-4, -6) \to (-6, -(-4)) = (-6, 4) \]
So, the new point after rotating \((-4, -6)\) 90 degrees clockwise about the origin is:
\[ \boxed{(-6, 4)} \]