Un-stenc

According to the Old English Dictionary:

es;

un-stenc

m. A bad smell, stench :-- Hý mid nosan ne magon náht geswæccan bútan unstences ormǽtnesse foetor ingenti complet putredine nares, Dóm. L. 207. Niht elles gestincan búton unstenca ormǽtnessa, Wulfst. 139, 8. un-stenc