Nature

world

Source:*světъProto-Slavic · “light, world”certain

The world as 'what the light falls on': the same *světъ gives 'light' in Russian свет.

I knowI'm learning

English

world

Polish

świat

ɕfjat

Learn freshDifferent words — learn this one fresh.

In all five languages

BCS script

Latin under Cyrillic

Russian
мирmir
mʲirdifferent word · Proto-Slavic *mirъ 'peace, community'
мир means both 'world' and 'peace'; свет keeps the sense 'world' in phrases like Новый Свет 'the New World'.
Ukrainian
світsvit
sʋʲitinherited
Polish
świat
ɕfjatinherited
Czech
svět
svjɛtinherited
Bosnian-Croatian-Serbian
svijet / svetсвијет / свет
ˈsvijetinherited
English
world