On-spannan

According to the Old English Dictionary:

on-spannan

I. literally, to unfasten, unclasp:--Þegn wine-dryhten his wætere gelafede, and his helm onspeón, Beo. Th. 5440; B. 2723. II. metaph. to open the mind, to speak, disclose the thoughts:--Ongan reordigan, wordlocan onspeónn, Andr. Kmbl. 940; An. 471. Onspeón, 1342; An. 671: Elen. 172; El. 86: Exon. Th. 247, 16; Jul. 79. on-spannan