An archaic or specialized term meaning to abandon completely or release from an obligation, especially used in legal contexts.
From de- (thoroughly, completely) + relinquish (from Latin relinquere, to leave behind). This intensified form of relinquish was used in formal legal and philosophical writing to emphasize complete abandonment.
In old legal documents, using 'derelinquish' instead of 'relinquish' added dramatic weight—it made abandonment sound final and absolute, which mattered when property or titles were at stake.
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