Where does “*āpuθra-” come from?

*āpuθra- (Proto-Iranian) comes from Proto-Iranian puθráh, from Proto-Indo-Iranian putrás, from Proto-Indo-European peh₂w- — few, little; smallness.

Ancestry of “*āpuθra-”, step by step

StepLanguageWordMeaning
1Proto-Iranianpuθráhson
2Proto-Indo-Iranianputrásboy; son
3Proto-Indo-Europeanpeh₂w-few, little; smallness
Every word from Proto-Indo-European peh₂w- →Every word from Proto-Indo-Iranian putrás →Every word from Proto-Iranian puθráh →