The Tocharian B word kauṃ
Word kauṃ
k au ṃ
IPA kɐuṃ
Meaning sun
See also Homeric Greek: καῦμα ‘burning heat’
Linear B: ke-ka-u-me-no ‘burnt’
Proto-Indo-European: *k̂ehₐu- ‘burn’
Tocharian A: koṃ ‘day, sun’

Other words that might be of interest
meñe ‘moon’, ścirye ‘star’, tarkär ‘cloud’, iprer ‘sky’, śiñcatstse ‘snow’, pūwar ‘fire’, taur ‘ash, dust’, läkutsetstse ‘bright’, pälk- ‘burn’, pälśalñe ‘burning’, ñäkciye ‘celestial’, wärs-2 ‘darken’, sleme ‘flame’, tsāk ‘illuminate’, parkāsaṃ ‘illumination’, korośāna ‘bright yellow’, yäp- ‘sunset’, skiyo ‘shade, shadow’, pälk ‘shine’