To evaluate the function \( f(x) = -4x - 5 \) for \( x = -1 \), substitute \(-1\) in place of \(x\):
\[ f(-1) = -4(-1) - 5 \]
Now, calculate each term:
\[ f(-1) = 4 - 5 \]
Finally, simplify the expression:
\[ f(-1) = -1 \]
Therefore, the value of \( f(-1) \) is \(-1\).