Where does “semiprone” come from?

semiprone (English) comes from English prone, from Middle English prone, from Latin pronus, from Latin prō, from Latin ratus, from Latin rēōr, from Proto-Italic rēōr, from Proto-Indo-European h₂reh₁- — to fit, to fix, to put together.

semiprone (English): Lying face down but with the knees angled to one side

Definitions

  1. Lying face down but with the knees angled to one side

Ancestry of “semiprone”, step by step

semiprone traces back through two separate lines of ancestry.

via English prone

StepLanguageWordMeaning
1EnglishproneLying face downward; Having a downward...
2Middle Englishprone
3Latinpronusturned forward, inclined, leaning, hanging; bent...
4Latinprōfor
5Latinratusconsidered, having been considered; established,...
6Latinrēōrto reckon, calculate
7Proto-Italicrēōrto reckon, to calculate; to think, to deem, to...
8Proto-Indo-Europeanh₂reh₁-to think, reason; to arrange
9Proto-Indo-Europeanh₂er-to fit, to fix, to put together

via English semi

StepLanguageWordMeaning
1EnglishsemiA semi-detached house; A semitrailer; a...
2Englishsemi-half; partial, incomplete; somewhat, rather,...
3Latinsēmi-half
4Proto-Indo-Europeansēmihalf; partially
Every word from Proto-Indo-European h₂er-Every word from Proto-Indo-European h₂reh₁-Every word from Proto-Italic rēōr