the quality or state of being fed or gratified to or beyond capacity : surfeit, fullness
the revulsion or disgust caused by overindulgence or excess
You may have accurately guessed that satiety is related to satisfy, satiate (meaning "to satisfy fully or to excess"), and sate (which means "to glut" or "to satisfy to the full"). Satiety, along with the others, ultimately comes from the Latin word satis, which means "enough." English speakers apparently couldn’t get enough of satis– derived words in the 15th and 16th centuries, when all of these words entered the language. Satiety itself was borrowed into English in the mid-1500s from the Middle French word satieté of the same meaning.