From Old French desavancer.
disadvance (third-person singular simple present disadvances, present participle disadvancing, simple past and past participle disadvanced)
- (obsolete, transitive) To draw back, pull back. [14th-17th c.]
- 1596, Edmund Spenser, The Faerie Queene, IV.3:
- Through Cambels shoulder it unwarely went, / That forced him his shield to disadvaunce.