Indo-European Keyterms

Indo-European
Kurgan
genetic classification
typological classification
inflected language
satem and centum languages
cognate words
inflection
cases
personal verb endings
number
tense
gender
strong and weak verbs
Germanic Consonant Shift: Grimm's Law and Verner's Law
Rasmus Rask
proto-Germanic

Sixth century BCE: Germanic Consonant shift
1786 William Jones
1822 Jacob Grimm, German Grammar, 2nd ed.
1915 Ferdinand de Saussure, Course in General Linguistics