The story
Clipping of feeble-minded. Etymology tree Anglo-Norman feblebor. Middle English feble English feeble English mind Proto-Indo-European *-tósder. Old English -ed Proto-Indo-European *-h₂ Proto-Indo-European *-éh₂ Proto-Indo-European *-tós Proto-Indo-European *-eh₂tos Proto-Germanic *-ōdaz Old English -od Middle English -ed English -ed English minded English feeble-minded English feeb
Etymology from Wiktionary, CC BY-SA 4.0.