Where does “λᾱῐ̈κός” come from?

λᾱῐ̈κός (Ancient Greek) comes from Ancient Greek λᾱός, from Proto-Hellenic lāwós, from Proto-Indo-European leh₂wos, from Proto-Indo-European leh₂- — to bark, howl; to be concealed.

λᾱῐ̈κός (Ancient Greek): of the people; popular