Where does “thurst” come from?

thurst (Middle English) comes from Old English þurst, from Proto-West Germanic þurstu, from Germanic *þurstuz, from Proto-Indo-European ters- — dry.

Ancestry of “thurst”, step by step

StepLanguageWordMeaning
1Old Englishþurstthirst
2Proto-West Germanicþurstuthirst
3Germanic*þurstuz—
4Proto-Indo-Europeanters-dry
Every word from Proto-Indo-European ters- →Every word from Germanic *þurstuz →Every word from Proto-West Germanic þurstu →