Clústor

According to the Old English Dictionary:

clúster, clauster;

CLÚSTOR

gen. clústres; pl. nom. acc. clústor, clustro; n. A lock, bar, barrier, cell; claustrum, clausura :-- Meahte ðæs ceasterhlides clústor onlúcan might unlock the lock of the city-gate, Exon. 12 a; Th. 20, 8; Cri. 314. Wæs mid clústre carcernes duru behliden the door of the prison was shut with a lock, Exon. 69 a; Th. 256, 23; Jul. 236. Ða locu feólion [feollan MS.], cluster of ðám ceastrum the locks fell, the barriers from that city, 120 a; Th. 461, 23; Hö. 40. Ðæt he mihte cuman þurh ðás clústro that he might pass through these barriers. Cd. 22; Th. 27, II; Gen. 416. He hine héht on carcernes [MS. carcerne] clúster belúcan he commanded him to be locked in a prison's cell, Bt. Met. Fox l, 146; Met. l, 73. [O. Sax. klústar, n: Frs. klooster, kleaster: O. Frs. klaster, n: Dut. klooster, n: Kil. klooster: Ger. kloster, n: M. H. Ger. O. H. Ger. klóster, n: Dan. Swed. kloster, n: Icel. klaustr, n: Lat. claustra, pl. n. a lock, bar, bolt.] clustor