Proto-Indo-European *káykos

→ Catalan cec (inherited)

→ Welsh coeg (inherited)

→ Spanish ciego (inherited)

→ Irish caoch (inherited)

→ Scottish Gaelic caoch (inherited)

→ Italian cieco (inherited)

→ Latin caecus (inherited)

→ Portuguese cego (inherited)

→ Romanian ceață (derived)

→ Sanskrit केकर (inherited)

→ Old Irish cáech (inherited)