Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Latvian četri
← Belarusian чаты́ры (cognate)
← Bulgarian че́тири (cognate)
← Czech čtyři (cognate)
← Old Church Slavonic четꙑре (cognate)
← Ancient Greek τέτταρες (cognate)
← Ancient Greek τέσσαρες (mention)
← Ancient Greek τέτορες (mention)
← Proto-Balto-Slavic *ketur- (mention)
← Proto-Indo-European *kʷetwóres (mention)
← Proto-Indo-European *kʷetwer- (mention)
← Proto-Indo-European *kʷetur- (mention)
← Proto-Indo-European *kʷa- (mention)
← Proto-Indo-European *kʷe- (mention)
← Proto-Indo-European *tʷer- (mention)
← Proto-Indo-European *tur- (mention)
← Latin quattuor (cognate)
← Lithuanian keturì (cognate)
← Latvian turēt (mention)
← Latvian tvert (mention)
← Latvian ceturtais (mention)
← Latvian certurkārt (mention)
← Latvian ceturksnis (mention)
← Latvian četri (mention)
← Polish cztery (cognate)
← Old Prussian kettwirts (cognate)
← Russian четы́ре (cognate)
← Sanskrit चतुर् (cognate)
← Ukrainian чоти́рі (cognate)
← Sudovian teter (cognate)
← Sudovian *kʲeter (mention)
← Sudovian *ketur- (mention)

→ Latgalian četri (cognate)
→ Latvian četri (mention)
→ Latvian četrinieks (suffix)