Body

eye

Source:*okoProto-Slaviccertain

I knowI'm learning

English

eye

Polish

oko

ˈɔkɔ

Cognate· distant (Indo-European)Same source — the sound laws connect them.

In all five languages

BCS script

Latin under Cyrillic

Russian
глазglaz
ɡlasdifferent word · Proto-Slavic *glazъ 'ball, pebble'
Russian replaced око (now poetic) with a word for a little ball; Polish głaz still means 'boulder'.
Ukrainian
о́коoko
ˈɔkɔinherited
Polish
oko
ˈɔkɔinherited
Czech
oko
ˈokoinherited
Bosnian-Croatian-Serbian
okoоко
ˈokoinherited
English
eye
Distant English relative — English eye and Slavic oko share an Indo-European root (*h₃ekʷ-).