Where does “бездумно” come from?

бездумно (Russian) comes from Russian безду́мный, from Russian ду́ма, from Old East Slavic дума, from Proto-Slavic duma, from Proto-Germanic dōmaz, from Proto-Indo-European dʰóh₁mos, from Proto-Indo-European dʰeh₁- — to do, put, place.

бездумно (Russian): thoughtlessly, unthinkingly; short neuter...

Definitions

  1. thoughtlessly, unthinkingly; short neuter...

Ancestry of “бездумно”, step by step

бездумно traces back through two separate lines of ancestry.

via Russian безду́мный

StepLanguageWordMeaning
1Russianбезду́мныйthoughtless, unthinking, feckless
2Russianду́маthought; administrative institution; duma
3Old East Slavicдума
4Proto-Slavicdumabreath, breathing; word; advice, council
5Proto-Germanicdōmazjudgement
6Proto-Indo-Europeandʰóh₁mosthat which is put, placed
7Proto-Indo-Europeandʰeh₁-to do, put, place

via Ukrainian безду́мний

StepLanguageWordMeaning
1Ukrainianбезду́мнийthoughtless, unthinking without proper thought or regard
2Ukrainianду́маsung epic poem
Every word from Proto-Indo-European dʰeh₁-Every word from Proto-Indo-European dʰóh₁mosEvery word from Proto-Germanic dōmaz