Where does “brainteasing” come from?

brainteasing (English) comes from English brain, from Middle English brayn, from Old English bræġn, from Proto-West Germanic *bragn, from Proto-Germanic bragną, from Proto-Indo-European mregʰnom, from Proto-Indo-European men- — to think, mind; spiritual activity; to stay,...

brainteasing (English): Puzzling; mentally challenging

Definitions

  1. Puzzling; mentally challenging

Ancestry of “brainteasing”, step by step

brainteasing traces back through two separate lines of ancestry.

via English brain

StepLanguageWordMeaning
1EnglishbrainThe control center of the central nervous system...
2Middle EnglishbraynThe brain or cerebrum; the organ of thought;...
3Old Englishbræġnbrain
4Proto-West Germanic*bragnbrain
5Proto-Germanicbragnąbrain
6Proto-Indo-Europeanmregʰnomskull, brain
7Proto-Indo-Europeanmen-to think, mind; spiritual activity; to stay,...

via English teasing

StepLanguageWordMeaning
1Englishteasingpresent participle of tease; The act of teasing;...
2EnglishteaseTo separate the fibres of a fibrous material; To...
3Middle EnglishtesenTo card straighten the fibres of wool
4Old Englishtǣsanto tease
5Proto-West Germanictaisijanto separate; to tug, to pluck; to shred
Every word from Proto-Indo-European men-Every word from Proto-Indo-European mregʰnomEvery word from Proto-Germanic bragną