The Old Norse word skuggi
Word skuggi
s k u g g i
Meaning shadow
See also Tocharian B: skiyo ‘shade, shadow’

Other words that might be of interest
eisa ‘fire’, eldr ‘fire’, aska ‘ashes’, skírr ‘clear, bright’, døkkr ‘dark’, dimmar ‘dark, gloomy’, myrkr ‘dark, murky’, dimma ‘darkness’, logi ‘flame, blaze’, heitr ‘hot, burning’, reykr ‘smoke, steam’, sól ‘sun’, sunna ‘sun’