Where does “unslakeable” come from?

unslakeable (English) comes from English slakeable, from English slake, from Middle English slaken, from Old English sleacian, from Old English slæc, from Proto-Germanic slakaz, from Proto-Indo-European (s)leh₁g- — weak, feeble; weak, faint.

unslakeable (English): That cannot be slaked

Definitions

  1. That cannot be slaked

Ancestry of “unslakeable”, step by step

unslakeable traces back through two separate lines of ancestry.

via English slakeable

StepLanguageWordMeaning
1EnglishslakeableCapable of being slaked
2EnglishslakeTo satisfy; To cool with water or another...
3Middle Englishslakento render slack, to slake
4Old Englishsleacian
5Old Englishslæclazy
6Proto-Germanicslakazslack, lax
7Proto-Indo-European(s)leh₁g-weak, feeble; weak, faint

via English un

StepLanguageWordMeaning
1EnglishunOne
Every word from Proto-Indo-European (s)leh₁g-Every word from Proto-Germanic slakazEvery word from Old English slæc