We start with the expression \(\left(\frac{2 w^{4}}{x^{-5}}\right)^{-5}\). By applying the negative exponent rule, we can rewrite it as \(\left(\frac{x^{-5}}{2 w^{4}}\right)^{5}\).
Next, we distribute the exponent of \(5\) to both the numerator and the denominator:
\[
\left(\frac{x^{-5}}{2 w^{4}}\right)^{5} = \frac{(x^{-5})^{5}}{(2 w^{4})^{5}} = \frac{x^{-25}}{32 w^{20}}
\]
To express the result using only positive exponents, we convert \(x^{-25}\) to \(\frac{1}{x^{25}}\):
\[
\frac{x^{-25}}{32 w^{20}} = \frac{1}{32 w^{20} x^{25}}
\]
The simplified expression using only positive exponents is:
\[
\boxed{\frac{1}{32 w^{20} x^{25}}}
\]