Where does “esba” come from?

esba (Middle Irish) comes from Old Irish esbae, from Old Irish ess-, from Old Irish léicid, from Proto-Celtic linkʷīti, from Proto-Indo-European linékʷti, from Proto-Indo-European leykʷ- — to leave.

Ancestry of “esba”, step by step

StepLanguageWordMeaning
1Old Irishesbaeuselessness, folly
2Old Irishess-ex-, out; privative prefix: non-, -less
3Old Irishléicidto leave, abandon, release, let go; to let,...
4Proto-Celticlinkʷītito leave, to leave behind
5Proto-Indo-Europeanlinékʷtito be leaving
6Proto-Indo-Europeanleykʷ-to leave
Every word from Proto-Indo-European leykʷ- →Every word from Proto-Indo-European linékʷti →Every word from Old Irish ess- →