Pashto سپی

← Avestan 𐬯𐬞𐬁 (cognate)

← Persian سگ (cognate)

← Proto-Indo-Iranian *ćwā́ (derived)

← Proto-Indo-European *ḱwṓ (derived)

← Proto-Iranian *cwā́ (inherited)

← Sanskrit श्वन् (cognate)

→ Persian سگ (cognate)

→ Persian اسبه (cognate)