Proto-IE: *dhōw-
Meaning: to sharpen
Old Indian: dhā́rā f. `sharp edge, rim, blade'
Avestan: dārā `Schneide, Schärfe', tiži-dāra- `mit scharfer Schneide'
Old Greek: thoó- `scharf', aor. ethóōsa `ich spitzte zu', pf. ptc. tethoōméno-
Russ. meaning: острить, точить