The Tocharian B word skiyo
Word skiyo
s k i j o
IPA skijo
Meaning shade, shadow
See also Homeric Greek: σκίασις ‘shadowing, shade’
Homeric Greek: σκιάζω ‘overshadow, shade, darken’
Old Norse: skuggi ‘shadow’

Comments
Douglas Q. Adams, “Etymological Dictionary of Tocharian B”, 1999, Brill

Other words that might be of interest
kauṃ ‘sun’, pūwar ‘fire’, taur ‘ash, dust’, läkutsetstse ‘bright’, pälk- ‘burn’, pälśalñe ‘burning’, wärs-2 ‘darken’, sleme ‘flame’, tsāk ‘illuminate’, parkāsaṃ ‘illumination’, korośāna ‘bright yellow’, yäp- ‘sunset’, pälk ‘shine’