Strang-mod

According to the Old English Dictionary:

strang-mod

adj. Of strong mind, confident, resolute :-- God ða unstrangan ðyses middangeardes geceás, ðæt ða strangmódan, ðe on ágenum mihtum truwiaþ, gescende wǽron, R. Ben. 138, 28. strang-mod