[German version]

The basis of the system of numerals (numeralia) in Indo-European languages is formed by the cardinalia (‘cardinal numbers’, e.g. Latin septem), to which correspond the derived forms of the ordinalia (‘ordinal numbers’, e.g. septimus) and multiplicatives (‘numeral adverbs’, e.g. septiēs). As elementary components of basic vocabulary, the lower cardinals are particularly resistant to replacement by borrowing or neologism and are therefore suited for proof of linguistic affinity. The first four Indo-European cardinal numbers were originally inflect…