Where does “זיס” come from?

זיס (Yiddish) comes from Middle High German süezi, from Old High German suozī, from Old High German -ī, from Proto-West Germanic -ī, from Proto-Germanic -į̄, from Proto-Indo-European -íh₂, from Proto-Indo-European -h₂ — Creates collective nouns, which refer to groups...

זיס (Yiddish): sweet; cute