Where does “schamefully” come from?
schamefully (Middle English) comes from Middle English schameful, from Old English sċeomfull, from Old English -ful, from Proto-Germanic -fullaz, from Proto-Germanic fullaz, from Proto-Indo-European pl̥h₁nós, from Proto-Indo-European pleh₁- — to fill.
Ancestry of “schamefully”, step by step