TheCaland system is a set of rules in the reconstructedProto-Indo-European language which describes how certain words, typicallyadjectives, are derived from one another.[1] It was named after Dutch IndologistWillem Caland (1859–1932), who first formulated part of the system.
Thecognates derived from these roots in different daughter languages often do not agree in formation, but show certain characteristic properties:[2][3]