insatiable
1. [ adjective ] impossible to satiate or satisfy
Synonyms: unsatiable insatiate
Examples:

"an insatiable appetite" "an insatiable hunger for knowledge"

Related terms: satiate unsated unsatisfiable quenchless
Similar spelling:   insatiably
  inestimable
  insatiate
  inextirpable
  instigate
  in_style
  in_stride
  instill
  inchoative
  instigative
  instigant
  inositol
  incitive
  institute
  instigator
  inactive
  in_store