Where does “συνέχεια” come from?

συνέχεια (Greek) comes from Ancient Greek συνέχεια, from Ancient Greek συνεχής, from Ancient Greek -ής, from Proto-Indo-European -ēs, from Proto-Indo-European -ess, from Proto-Indo-European -os — Creates action nouns or result nouns from verbs;...

συνέχεια (Greek): continuously, nonstop; continuously,...