Time & numbers

seven

Source:*sedmьProto-Slaviccertain

East Slavic dropped the d (семь, сім); Polish and BCS broke up the final -dm with a new vowel (siedem, sedam).

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English

seven

Polish

siedem

ˈɕɛdɛm

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

In all five languages

BCS script

Latin under Cyrillic

Russian
семьsemʹ
sʲemʲinherited
Ukrainian
сімsim
sʲiminherited
Polish
siedem
ˈɕɛdɛminherited
Czech
sedm
ˈsɛdm̩inherited
Bosnian-Croatian-Serbian
sedamседам
ˈsedaminherited
English
seven
Distant English relative — Seven and *sedmь share Indo-European *septḿ̥.