The Collaborative International Dictionary of English v.0.48:
Assiege \As*siege"\, v. t. [OE. asegen, OF. asegier, F. assi['e]ger, fr. LL. assediare, assidiare, to besiege. See Siege.] To besiege. [Obs.] "Assieged castles." --Spenser. [1913 Webster]The Collaborative International Dictionary of English v.0.48:
Assiege \As*siege"\, n. A siege. [Obs.] --Chaucer. [1913 Webster]