Where does “rear up” come from?

rear up (English) comes from English rear, from Middle English reren, from Old English rǣran, from Proto-Germanic raizijaną, from Proto-Germanic rīsaną, from Proto-Indo-European h₁rey- — to arise, arise; to rise, arise; to rise; arise.

rear up (English): To rise up, especially an animal like a horse...

Definitions

  1. To rise up, especially an animal like a horse...

Ancestry of “rear up”, step by step

rear up traces back through two separate lines of ancestry.

via English rear

StepLanguageWordMeaning
1EnglishrearTo bring up to maturity, as offspring; to...
2Middle EnglishrerenTo raise; to hold or pull up or suspend upwards;...
3Old Englishrǣranto cause to rise, raise, rear, build, create; to...
4Proto-Germanicraizijanąto cause to rise; raise
5Proto-Germanicrīsanąto scale; move vertically; to rise
6Proto-Indo-Europeanh₁rey-to arise, arise; to rise, arise; to rise; arise

via English up

StepLanguageWordMeaning
1EnglishupAway from the surface of the Earth or other...
2Middle Englishupto a vertical axis
3Old Englishuppup; upstairs
4Proto-West Germanic*upp
Every word from Proto-Indo-European h₁rey-