Where does “безакониѥ” come from?

безакониѥ (Church Slavonic) comes from Proto-Slavic zakonъ, from Proto-Slavic konъ, from Proto-Slavic čęti — to begin.

Ancestry of “безакониѥ”, step by step

StepLanguageWordMeaning
1Proto-Slaviczakonъlaw
2Proto-Slavickonъbeginning; end
3Proto-Slavicčętito begin
Every word from Proto-Slavic čęti →Every word from Proto-Slavic konъ →Every word from Proto-Slavic zakonъ →