Where does “अर्धायु” come from?
अर्धायु (Hindi) comes from Hindi आयु, from Sanskrit आयु, from Proto-Indo-Aryan Hā́yu, from Proto-Indo-Iranian Hā́yu, from Proto-Indo-European h₂óyu, from Proto-Indo-European h₂ey- — vital force, life, age, eternity; day, morning.
अर्धायु (Hindi): half-life
Ancestry of “अर्धायु”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Hindi | आयु | age; lifetime; duration or period of life |
| 2 | Sanskrit | आयु | man, a living being; mankind, human race; son,... |
| 3 | Proto-Indo-Aryan | Hā́yu | — |
| 4 | Proto-Indo-Iranian | Hā́yu | lifetime, life |
| 5 | Proto-Indo-European | h₂óyu | long time, lifetime |
| 6 | Proto-Indo-European | h₂ey- | vital force, life, age, eternity; day, morning |