h₂r̥h₁dʰéh₂ (Proto-Indo-European) comes from Proto-Indo-European Hreh₁dʰ-, from Proto-Indo-European h₂reh₁-, from Proto-Indo-European h₂er- — to fit, to fix, to put together.
h₂r̥h₁dʰéh₂ (Proto-Indo-European): row, series