Where does “unspontaneity” come from?

unspontaneity (English) comes from English spontaneity, from Latin spontāneus, from Latin -āneus, from Latin -eus, from Proto-Italic *-eos — Forms adjectives indicating being formed out of a material.

unspontaneity (English): The quality of not being spontaneous

Definitions

  1. The quality of not being spontaneous

Ancestry of “unspontaneity”, step by step

unspontaneity traces back through two separate lines of ancestry.

via English spontaneity

StepLanguageWordMeaning
1EnglishspontaneityThe quality of being spontaneous; Spontaneous...
2Latinspontāneusvoluntary, spontaneous
3Latin-āneusforming adjectives Of or pertaining to; -aneous
4Latin-eusargentum + API → argenteus; ferrum + API →...
5Proto-Italic*-eosForms adjectives indicating being formed out of a material

via English un

StepLanguageWordMeaning
1EnglishunOne
Every word from Proto-Italic *-eosEvery word from Latin -eusEvery word from Latin -āneus