Where does “полуоткрытый” come from?

полуоткрытый (Russian) comes from Russian полу-, from Old East Slavic полъ, from Proto-Slavic polъ, from Proto-Indo-European (s)pelH- — to split off, separate; to chop, to separate.

полуоткрытый (Russian): half open, semiopen

Definitions

  1. half open, semiopen

Ancestry of “полуоткрытый”, step by step

StepLanguageWordMeaning
1Russianполу-semi-, demi-, half-; semi-, demi-, half- paired...
2Old East Slavicполъfloor
3Proto-Slavicpolъside, flank; half; member of a pair of options →...
4Proto-Indo-European(s)pelH-to split off, separate; to chop, to separate
Every word from Proto-Indo-European (s)pelH- →Every word from Proto-Slavic polъ →Every word from Russian полу- →