The Hebrew word deror (דְּרוֹר) means liberty, release, or freedom — particularly the freedom proclaimed in the Year of Jubilee when slaves were released and debts forgiven. It may derive from a word meaning to flow freely, like a swallow in flight. It appears in Leviticus 25 as the Jubilee proclamation and is taken up by the prophets as a picture of ultimate liberation.
Deror is the Jubilee word — it encapsulates Israel's experience of freedom from bondage. God commanded Israel to 'proclaim liberty throughout the land' (Leviticus 25:10), words famously inscribed on America's Liberty Bell. Isaiah 61:1 uses deror to describe the Messiah's mission — releasing captives and proclaiming freedom — a passage Jesus read in the Nazareth synagogue to announce His ministry (Luke 4:18–19). Christ is the ultimate Jubilee, canceling the debt of sin and releasing humanity from bondage.