अढाई (Old Hindi) comes from Sauraseni Prakrit 𑀅𑀟𑁆𑀠𑀸𑀇𑀬, from Ashokan Prakrit 𑀅𑀠𑀢𑀺𑀬, from Sanskrit अर्धतृतीय, from Sanskrit अर्ध, from Proto-Indo-Iranian Hárdʰas, from Proto-Indo-European h₁érdʰ-o-s, from Proto-Indo-European h₁er- — earth.
अढाई (Old Hindi): two and a half