זײַדן (Yiddish) comes from Yiddish זײַד, from Middle High German sīde, from Old High German sīda, from Proto-Germanic *sīdā, from Latin sēta, from Latin saeta, from Proto-Italic saitā, from Proto-Indo-European séh₂ito- — to satiate, satisfy.
זײַדן (Yiddish): silken, silky; plural of זײַד