Where does “laikus” come from?

laikus (Hungarian) comes from Medieval Latin laicus, from Ancient Greek λαϊκός, from Ancient Greek λᾱός, from Proto-Hellenic lāwós, from Proto-Indo-European leh₂wos, from Proto-Indo-European leh₂- — to bark, howl; to be concealed.

laikus (Hungarian): lay, non-professional, unprofessional, inexpert;...