[German version]

The mnemonic Centum (from Latin centum) stands for those Indo-Germanic languages in which there is coincidence between the palatal series k̑, g̑, g̑^h and the unaccented k, g, g^h series of the Old Indo-Germanic tectals ( Gutturals) and the unaccented series: Old Indo-Germanic *kreuh₂- ‘bloody flesh’ > Latin cruor, Greek kréas, *k̑ṛd- ‘heart’ > Latin cor, Greek kardía. Otherwise (in so-called  Satem languages) the palatals preserved as independent phonemes become sibilants. In Centum the labio-velars k^w , g^w , g^wh (initially) remain preserved as phonemes, e.g…