The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
Appendix I
Indo-European Roots
ENTRY:
s-
DEFINITION:
To satisfy. Oldest form *se2-, colored to *sa2-, contracted to *s-.1. Suffixed zero-grade form *s-to-.a.sad, from Old English sæd, sated, weary, from Germanic *sadaz, sated; b.sate1, from Old English sadian, to sate, from derivative Germanic verb *sadn, to satisfy, sate. 2. Suffixed zero-grade form *s-ti-.satiate, satiety; assai2, asset, satisfy, from Latin satis, enough, sufficient. 3. Suffixed zero-grade form *s-tu-ro-.satire, saturate, from Latin satur, full (of food), sated. 4. Suffixed zero-grade form *s-d-ro-.hadron, from Greek hadros, thick. (Pokorny s- 876.)