bright, light-coloured

• Russian
  све́тлыйsvetlyj

  ˈsvʲetlɨjinherited
• Ukrainian
  сві́тлийsvitlyj

  ˈsʋʲitlɪjinherited
• Polish
  jasny

  ˈjasnɨdifferent word · Proto-Slavic *jasnъ 'clear, bright'

  Polish światły, the cognate, means 'enlightened'.

• Czech
  světlý

  ˈsvjɛtliːinherited
• Bosnian-Croatian-Serbian
  svijetao / svetaoсвијетао / светао

  ˈsvijetaoinherited
• English
  bright, light-coloured

Sound laws at work

• Jat (ě) and its reflexes
• Ukrainian і (ikavism)
• BCS syllable-final l → o