Reconstruction:Proto-Slavic/pьrati

• Per Derksen, related to *però (“wing”), from Proto-Indo-European *pr̥H-, from *perH-. Cognate with Gothic 𐍆𐌰𐍂𐌰𐌽 (faran, “to wander”), German fahren (“to travel”), English fare, and less directly with Lithuanian spar̃nas (“wing”), Latvian spā̀rns (“wing”), Sanskrit पर्ण (parṇá, “wing”), Ancient Greek πτερόν (pterón, “wing”), Old English fearn (“fern”), English fern, Old Irish raith (“fern”).
• Per Vasmer, cognate with Ancient Greek πείρω (peírō, “to pierce, to break”), περάω (peráō, “to pierce, to break”), πόρος (póros, “passage”), πορθμός (porthmós, “isthmus, crossing”), Sanskrit पिपर्ति (píparti, “to transport, to transfer”), Gothic 𐍆𐌰𐍂𐌰𐌽 (faran, “to wander”), German fahren (“to travel”), English fare. This apparently reflects Proto-Indo-European *per-, without a laryngeal.
• Others derive both *però (“wing”) and Ancient Greek πτερόν (pterón, “wing”) from Proto-Indo-European *péth₂r̥, cognate with English feather.

Note that Vasmer derives Old Church Slavonic перѫтъ (perǫtŭ, “they fly”) from Proto-Slavic *perti (“to fly”) (etymologically separate from the normal verb of that shape). This derivation is not consistent with evidence from other languages, which show that *perti has 1sg. *pьrǫ rather than **perǫ. Vasmer also includes Russian пере́ть (perétʹ, “to move, to travel”) as a derivative of this putative verb rather than as a colloquial, secondary development from the primary meaning "to drag".

*pьrati impf [1][2]

1. to fly

• *pariti
• *però (“feather”) (see there for more)
• *perъka (“propeller, fin (of fish)”)

• Church Slavonic: перу (peru, “I fly, I move”) (Russian)
• South Slavic:
  • Old Church Slavonic:

    Cyrillic: 1sg. перѫ (perǫ, “I fly”), 3pl. перѫтъ (perǫtŭ, “they fly”)

    Glagolitic: [Term?]

• Vasmer (Fasmer), Max (Maks) (1964–1973), “пере́ть”, in Etimologičeskij slovarʹ russkovo jazyka [Etymological Dictionary of the Russian Language] (in Russian), translated from German and supplemented by Trubačóv Oleg, Moscow: Progress

Formed as *perti +‎ *-ati, descending either from Proto-Indo-European *per- (“to propel, forwards”) or from Proto-Indo-European *(s)perH- (“to trample, to spurn”) (see *perti for further explanation). The present tense declension continues the simple thematic forms *(s)per(H)-é-ti.

*pьràti [3][4][5][6]

1. to beat, to trample
2. to wash (originally referring to the old-style manual washing by scrubbing and stirring)

• Intensive derivative: *-pirati

• *pьranьje (“laundry”)
• *pеralьňa (“washing box, washing machine”)
• *perilьnъ (“washing-related”)
• *periteľь (“washer (agent)”)
• *peridlo (“washer (tool)”)

• Church Slavonic: пьрати (pĭrati)
• East Slavic:
  • Old East Slavic: пьрати (pĭrati)
    • Belarusian: праць (pracʹ)
    • Russian: прать (pratʹ), попра́ть (poprátʹ)
    • Ukrainian: пра́ти (práty)
• South Slavic:
  • Bulgarian: пера́ (perá)
  • Macedonian: пере (pere)
  • Serbo-Croatian:

    Cyrillic: пра̏ти

    Latin: prȁti

    • Chakavian (Vrgada): prȁti
    • Chakavian (Orbanići?): prȁt
  • Slovene: práti (tonal orthography)
• West Slavic:
  • Czech: prát
  • Polish: prać
  • Slovak: prať
  • Sorbian:
    • Upper Sorbian: prać
    • Lower Sorbian: praś

• Vasmer (Fasmer), Max (Maks) (1964–1973), “прать”, in Etimologičeskij slovarʹ russkovo jazyka [Etymological Dictionary of the Russian Language] (in Russian), translated from German and supplemented by Trubačóv Oleg, Moscow: Progress