Where does “quên lãng” come from?

quên lãng (Vietnamese) comes from Vietnamese làng, from French flan, from Old French flaon, from Late Latin fladonem, from Latin fladō, from Frankish flaþō, from Proto-Indo-European pl̥h₂t-, from Proto-Indo-European pelh₂- — to cover, to wrap; skin, hide, cloth; to fold.

Ancestry of “quên lãng”, step by step

quên lãng traces back through two separate lines of ancestry.

via Vietnamese làng

StepLanguageWordMeaning
1Vietnameselàngvillage; circles; world
2Frenchflanbaked custard tart; coin die
3Old Frenchflaonflan
4Late Latinfladonem
5Latinfladō
6Frankishflaþōflat-cake; flat cake; thin fried batter cake,...
7Proto-Indo-Europeanpl̥h₂t-broad, flat
8Proto-Indo-Europeanpelh₂-to approach
9Proto-Indo-Europeanpel-to cover, to wrap; skin, hide, cloth; to fold

via Vietnamese quen

StepLanguageWordMeaning
1Vietnamesequenfamiliar
2Chinese
Every word from Proto-Indo-European pel-Every word from Proto-Indo-European pelh₂-Every word from Proto-Indo-European pl̥h₂t-