talus

From Proto-Italic *tākslos, with multiple theories proposed: * Possibly from Proto-Indo-European *téh₂g-s-los, from *teh₂g- (“to touch”) (whence tangō). * Alternatively, cognate with Sanskrit तल (tala, “plane, surface”). * From *steh₂- (“to stand”) + *-tleh₂/*-dʰleh₂ (instrument noun suffix), and directly cognate with Welsh sawdl (“heel”). This is phonetically difficult, as it requires an s-less variant of *steh₂-, as well as addition of an unknown and arbitrary suffix *-k-.