She cut the paper gingerly.
She cut him loose.
gingerly above is an adverb but loose isn't.
This is because gingerly describes the manner of "her" cutting the paper, but loose doesn't do so.
What does it mean to say that loose is an object complement? By definition, an object complement describes the object. Does it mean that in the sentence above it tells us how the person was after being cut loose? In other words, does the object complement tell us that the person was free after being cut loose?