There's a lot of PIE adjectives ending in -g^Hu. Is this a relict of a "fossil" suffix?
mrg^Hu- "short", bHng^Hu- "thick, fat", dHngHu- "fast?", dHrgHu- "strong? hard?", h2ng^Hu- "narrow", lng(W)Hu- "light" (cf. levis, elakhys, elaphros, light, if they are related).
JS Lopes
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