Where does “softplus” come from?

softplus (English) comes from English soft, from Middle English softe, from Old English sōfte, from Proto-West Germanic samftō, from Proto-West Germanic -ō, from Proto-Germanic -ô, from Proto-Indo-European -ō — Derives nouns from roots.

softplus (English): A smooth approximation to the rectifier in neural...

Definitions

  1. A smooth approximation to the rectifier in neural...

Ancestry of “softplus”, step by step

softplus traces back through two separate lines of ancestry.

via English soft

StepLanguageWordMeaning
1EnglishsoftEasily giving way under pressure; Smooth and...
2Middle Englishsoftesoft
3Old Englishsōftesoftly
4Proto-West Germanicsamftōsoftly, gently
5Proto-West Germanic-ōCreates adverbs from adjectives; Creates agent...
6Proto-Germanic-ô-ly; Forms agent nouns, often from the zero-grade...
7Proto-Indo-European-ōDerives nouns from roots

via English plus

StepLanguageWordMeaning
1EnglishplusAnd; sum of the previous one and the following...
2Latinplūsmore; more of
3Old Latinplous—
4Proto-Indo-Europeanploh₁is-—
Every word from Proto-Indo-European -ō →Every word from Proto-Germanic -ô →Every word from Proto-West Germanic -ō →