Where does “*rād-” come from?

*rād- (Proto-Iranian) comes from Proto-Indo-Iranian HraHdʰ-, from Proto-Indo-European Hreh₁dʰ-, from Proto-Indo-European h₂reh₁-, from Proto-Indo-European h₂er- — to fit, to fix, to put together.

Ancestry of “*rād-”, step by step

StepLanguageWordMeaning
1Proto-Indo-IranianHraHdʰ-—
2Proto-Indo-EuropeanHreh₁dʰ-to think; to arrange; to succeed, accomplish
3Proto-Indo-Europeanh₂reh₁-to think, reason; to arrange
4Proto-Indo-Europeanh₂er-to fit, to fix, to put together

Words derived from “*rād-”

Every word from Proto-Indo-European h₂er- →Every word from Proto-Indo-European h₂reh₁- →Every word from Proto-Indo-European Hreh₁dʰ- →