Where does “nonsound” come from?

nonsound (English) comes from English Sound, from Middle English sound, from Old English sund, from Old Norse sund, from Proto-Germanic sundą, from Proto-Germanic swimmaną, from Proto-Indo-European swem(bʰ)- — to bend, turn, swing; to be unsteady, move, swim.

nonsound (English): That which is not sound

Definitions

  1. That which is not sound

Ancestry of “nonsound”, step by step

nonsound traces back through two separate lines of ancestry.

via English Sound

StepLanguageWordMeaning
1EnglishSoundThe strait that separates Zealand (an island of Denmark) from Scania (part of Sweden); also sometimes called by the Danish name, Øresund
2Middle Englishsound
3Old Englishsundswimming; sea, water
4Old Norsesundswimming; strait, sound; swimming, sound
5Proto-Germanicsundąswimming; sound, strait
6Proto-Germanicswimmanąto be unsteady; to swim; float
7Proto-Indo-Europeanswem(bʰ)-to bend, turn, swing; to be unsteady, move, swim

via English non

StepLanguageWordMeaning
1EnglishnonObsolete form of none
2Frenchnonno; not; a no, a negative response
3Old Frenchnonno; not; Alternative form of nom
4Latinnōnnot
5Old Latinnoenum
6Proto-Indo-Europeanóynosone; single
Every word from Proto-Indo-European swem(bʰ)-Every word from Proto-Germanic swimmanąEvery word from Proto-Germanic sundą