1.AdjectiveHaving a shifting (mobile) accent that falls on the root (alternatively, the first or penultimate syllable of the stem) in the direct case-forms, and on the suffix (alternatively, the ultimate syllable of the stem) in the weak case-forms.
"The Proto-Indo-European word for ‘thought’ was proterokinetic: nominative singular *mén-ti-s, genitive *mn̥-téy-s."