appropriator comes from appropriate (from Late Latin appropriare 'to make one's own', from ad- and proprius 'one's own') plus the agentive suffix -or. Morphologically, the word is transparent: -or is attached to the older base named in the history, so the modern form packages an inherited or borrowed stem inside a later English derivative. In modern use, the noun sense is "a person who takes something for their own use, often without right", which keeps the etymology connected to the word's present dictionary value rather than treating it as a merely historical label. The wider word family includes related English forms such as appropriate, appropriation, proper, property, showing how the same base continues to support neighboring English vocabulary. The principal historical forms in the chain include Latin appropriare, Latin proprius, which anchor the explanation in named linguistic material.