←
English senex (cognate)
←
Ancient Greek ἕνος (cognate)
←
Proto-Indo-Iranian *sánas (inherited)
←
Proto-Indo-Aryan *sánas (inherited)
←
Proto-Indo-European *sénos (inherited)
←
Old Armenian հին (cognate)
→
Ancient Greek ἕνος (cognate)
→
Sanskrit सनातन (compound)