Proto-Iranian *ātr-

→ Avestan 𐬁𐬙𐬀𐬭 (inherited)

→ Baluchi آس (inherited)

→ Baluchi آچ (inherited)

→ Czech vatra (derived)

→ Czech vatra (derived)

→ Persian تش (derived(fa/bqi))

→ Hindi आतिश (derived)

→ Northern Kurdish agir (inherited)

→ Ossetian арт (inherited)

→ Albanian votër (cognate)

→ Old Armenian ատրուշան (cognate)

→ Old Armenian ատր- (derived)