From Proto-Indo-Iranian *čatwā́ras , from Proto-Indo-European *kʷetwóres .
*čaθwā́rah m pl (feminine plural *čátasrah , neuter plural *čaθwā́r )[ 1]
four
Central Iranian:
Northeastern Iranian:
Proto-Scythian: *caθwāri Proto-Sarmatian: *cauθβār Old Ossetic: *cuppar Alanic:Digor Ossetian: цуппар ( cuppar ) Iron Ossetian: цыппар ( cyppar ) Proto-Saka-Wakhi: *caθβāri
Sogdo-Bactrian:
Bactrian: σοφαρο ( sofaro )
Khwarezmian: [script needed] ( cfʾr )
Proto-Sogdic:
Sogdian: [script needed] ( čatfār )
Yagnobi: тафор ( tafor )
Southeastern Iranian:
Ormuri-Parachi:
Ormuri: ښری ( ṣ̌rī )
Parachi: čōr
Pashto: څلور ( śalór )
Shughni: cavōr
Northwestern Iranian:
Baluchi: چار ( cár )
Kurdish:
Northern Kurdish: çar
Central Kurdish: چوار ( çwar ) , چار ( çar )
Proto-Medo-Parthian:
Parthian:
Manichaean script: 𐫝𐫜𐫀𐫡 ( cfʾr /čafār/ )
Zazaki: chehar
Southwestern Iranian:
Middle Persian: ( /čahār/ ) }
Book Pahlavi script: [Book Pahlavi needed] ( ALBA ) , [Book Pahlavi needed] ( chʾl )
Classical Persian: چهار ( čahâr )
Dari: چهار ( čahâr )
Iranian Persian: چهار ( čahâr )
Tajik: чор ( čor ) , чаҳор ( čahor )
^ Cheung, Johnny (2011 ) Selected Pashto Problems II. Historical Phonology 1: On Vocalism and Etyma (Iran and the Caucasus)[1] , volume 15 , numbers 1-2 , Brill Academic Publishers, page 177 : “*čaθwā́ra- ”