Where does “лженаука” come from?

лженаука (Russian) comes from Russian ложь, from Old East Slavic лъжь, from Proto-Slavic lъžь, from Proto-Indo-European h₂lewgʰ- — to announce, tell publicly.

лженаука (Russian): pseudoscience

Definitions

pseudoscience

Ancestry of “лженаука”, step by step

лженаука traces back through two separate lines of ancestry.

via Russian ложь

Step	Language	Word	Meaning
1	Russian	ложь	lie, falsehood
2	Old East Slavic	лъжь	lie, falsehood
3	Proto-Slavic	lъžь	lie
4	Proto-Indo-European	h₂lewgʰ-	to announce, tell publicly

via Russian нау́ка

Step	Language	Word	Meaning
1	Russian	нау́ка	science
2	Proto-Slavic	nauka	teaching, learning

Every word from Proto-Indo-European h₂lewgʰ- →Every word from Proto-Slavic lъžь →Every word from Old East Slavic лъжь →