Proto-Indo-European *kʷeḱ-

→ Assamese চকু (inherited)

→ Assamese চখু (inherited)

→ Persian نگاه (derived)

→ Persian آگاه (derived)

→ Persian گواه (mention)

→ Ancient Greek τεκμήριον (root)

→ Ancient Greek τέκμαρ (root)

→ Ancient Greek τέκμαρ (inherited)

→ Ancient Greek τεκμαίρομαι (root)

→ Ancient Greek τεκμαίρομαι (inherited)

→ Early Assamese চক্ষু (derived)

→ Old Persian 𐎣𐎠𐎿𐎣 (mention)

→ Sanskrit चक्षु (mention)

→ Sanskrit काशते (mention)

→ Sanskrit चष्टे (root)

→ Sanskrit चष्टे (mention)

→ Sylheti ꠌꠃꠈ (derived)