Where does “гладкоствольный” come from?

гладкоствольный (Russian) comes from Russian гла́дкий, from Proto-Slavic gladъkъ, from Proto-Balto-Slavic glā́ˀdus, from Proto-Indo-European gʰleh₂dʰ- — bright, shining; smooth.

гладкоствольный (Russian): smoothbore

Definitions

  1. smoothbore

Ancestry of “гладкоствольный”, step by step

гладкоствольный traces back through two separate lines of ancestry.

via Russian гла́дкий

StepLanguageWordMeaning
1Russianгла́дкийsmooth
2Proto-Slavicgladъkъsmooth, plain
3Proto-Balto-Slavicglā́ˀdussmooth
4Proto-Indo-Europeangʰleh₂dʰ-bright, shining; smooth

via Russian ствол

StepLanguageWordMeaning
1Russianстволtrunk, tree trunk
2Proto-Slavic*stьvolъtrunk?
Every word from Proto-Indo-European gʰleh₂dʰ- →Every word from Proto-Balto-Slavic glā́ˀdus →Every word from Proto-Slavic gladъkъ →