Proto-Indo-European *dweh₂-

→ Spanish duro (mention)

→ Persian دور (mention)

→ Galician duro (mention)

→ Ancient Greek δηρός (mention)

→ Ancient Greek δήν (mention)

→ Italian duro (mention)

→ Khmer ទូត (root)

→ Kannada ದೂತ (root)

→ Latin durus (mention)

→ Lombard dur (mention)

→ Old Persian 𐎯𐎢𐎼𐎡𐎹 (derived)

→ Maharastri Prakrit 𑀤𑀽𑀅 (derived)

→ Pashto لرې (derived)

→ Portuguese duro (mention)

→ Romani dur (mention)

→ Sanskrit दूत (derived)

→ Sanskrit दूर (mention)

→ Sanskrit दविष्ठम् (mention)

→ Old Armenian երկայն (inherited)