From sate + -less.
sateless (comparative more sateless, superlative most sateless)
- (archaic) Insatiable.
- Synonyms: unsated, unsating
1742, [Edward Young], The Complaint: Or, Night-Thoughts on Life, Death, & Immortality, London: […] [Samuel Richardson] for A[ndrew] Millar […], and R[obert] Dodsley […], published 1750, OCLC 753424981:
His sateless thirst of pleasure , gold , and fame
sateless in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.