Where does “soothest” come from?

soothest (English) comes from English sooth, from Middle English sooth, from Old English sōþ, from Proto-West Germanic sanþ, from Proto-Germanic sanþaz, from Proto-Indo-European h₁sónts, from Proto-Indo-European h₁ēs- — to be.

soothest (English): superlative form of sooth: most sooth;...

Definitions

  1. superlative form of sooth: most sooth;...

Ancestry of “soothest”, step by step

soothest traces back through two separate lines of ancestry.

via English sooth

StepLanguageWordMeaning
1EnglishsoothTruth; Augury; prognostication; Blandishment;...
2Middle Englishsooth—
3Old Englishsōþtrue, sooth; truth; true, actual, real
4Proto-West Germanicsanþtrue; truth
5Proto-Germanicsanþaztrue, real
6Proto-Indo-Europeanh₁sóntsactive participle of *h₁ésti; being, existence;...
7Proto-Indo-Europeanh₁ēs-to be

via English soothe

StepLanguageWordMeaning
1EnglishsootheTo restore to ease, comfort, or tranquility;...
2Middle Englishsothento prove; to verify, prove the validity of
3Old Englishsōþianto verify, prove, confirm, bear witness to; to...
4Proto-Germanicsanþōnąto prove true, show to be true
Every word from Proto-Indo-European h₁ēs- →Every word from Proto-Indo-European h₁sónts →Every word from Proto-Germanic sanþaz →