Where does “retroshade” come from?

retroshade (English) comes from English shade, from Middle English schade, from Old English sċeadu, from Proto-West Germanic skadu, from Proto-Germanic skaduz, from Proto-Indo-European (s)ḱeh₃- — darkness, shadow.

retroshade (English): A transitional period, occurring immediately before and after retrograde, during which a planet moves across the same part of the sky twice

Definitions

  1. A transitional period, occurring immediately before and after retrograde, during which a planet moves across the same part of the sky twice

Ancestry of “retroshade”, step by step

StepLanguageWordMeaning
1EnglishshadeDarkness where light, particularly sunlight, is...
2Middle EnglishschadeA shadow or a similar effect; A shade or...
3Old Englishsċeadushadow, shade; darkness; protection
4Proto-West Germanicskadushadow
5Proto-Germanicskaduza shadow
6Proto-Indo-European(s)ḱeh₃-darkness, shadow
Every word from Proto-Indo-European (s)ḱeh₃-Every word from Proto-Germanic skaduzEvery word from Proto-West Germanic skadu