Etymologically

Etymology and origin of the Russian word мочь

мочь1 to be able

Confidence
Established
Formation
Inherited
First attested
1100s Pilgrimage of Daniel the Abbot
Inherited from
Old East Slavic мочи
Ultimate origin
Proto-Slavic *moťi

Pronunciation

Forms

мочь (močʹ) impf (perfective смочь)[1]

Etymology

The verb “to be able” is inherited from Old East Slavic мочи (moči), first person могу (mogu), from Proto-Slavic *moťi, earlier *mogti, first person *mogǫ.[2][3][1] The Slavic forms include Old Church Slavonic мошти (mošti), могѫ (mogǫ), Ukrainian могти (mohty), Bulgarian мо́га (móga, “I can”), Czech moci and Polish móc.[2][4] The infinitive changed regularly: /gt/ became /kt/ and then ⟨ч⟩, as in ночь, and the final unstressed ⟨-и⟩ was dropped.[5][6] The Church Slavonic infinitive is мощи (mošti).[3]

Vasmer sees in the Proto-Slavic present the relic of an unreduplicated perfect of an athematic verb.[2] The closest cognate is the Germanic verb Proto-Germanic *maganą (“to be able”) (whence may); further comparisons are Lithuanian mėgti (“to like”), Latvian mēgt (“to be able; to be used to”) and Ancient Greek μῆχος (mêkhos, “means, remedy”), with μηχανή (mēkhanḗ, “device”).[2][7][1] The root is given as Proto-Indo-European *megʰ- (“to be able”).[1][3] Vasmer rejects a link with Latin magnus and Ancient Greek μέγας (mégas), and also a Germanic or a Celtic loan.[2] Melnichuk took “to pull” as the original sense, from verbs such as вымогать and домогаться.[4]

Earliest recorded meaning

Chernykh's first record of мочи, могу is in the pilgrimage of Daniel the Abbot, in the 12th century; books more often have the Church Slavonic мощи.[3] Shaposhnikov lists the Old Russian senses “to be strong enough (to do something)”, “to be healthy” and “to have power or influence”.[7]

Semantic evolution

Shaposhnikov dates the sense “to be well off, to own property (of a given size)” to the 16th century and 1670, and notes the old phrases не мози “do not” and можетъ быти “perhaps”.[7] The 18th-century language had the Church Slavonic мощи beside мочь, and used the verb of things as well as of people.[8] The participle могучий, as an adjective, is recorded in the Academy dictionary of 1793.[3][7]

The old sense “to be healthy” survives in dialects: можешь ли? asks after someone's health.[9][10]

Timeline

  • 12th century – мочи, могу in Daniel the Abbot's pilgrimage.[3]
  • 16th century – “to be well off” among the senses of the verb.[7]
  • 1793 – могучий recorded as an adjective in the Academy dictionary.[3][7]

Meanings

Verb

  1. To be able, to have the strength (to do something), followed by an infinitive.[11][12]
  2. To have the possibility or permission to do something, once an obstacle is removed.[13]
  3. In может быть or быть может (parenthetical): perhaps, maybe.[11]
  4. (regional) To be healthy.[9]

Word family

  • смочь
  • помочь
  • превозмочь
  • изнемочь
  • занемочь
  • вымогать
  • домогаться
  • могучий

мочь2 might, strength

Confidence
Established
Formation
Inherited
First attested
1224 First Novgorod Chronicle
Inherited from
Old East Slavic мочь
Ultimate origin
Proto-Slavic *moťь

Pronunciation

Forms

мочь (močʹ) f inan (genitive мо́чи, nominative plural мо́чи, genitive plural мо́чей)[1]

Etymology

The noun “might” is inherited from Old East Slavic мочь (močĭ), from Proto-Slavic *moťь, earlier *moktь.[14][1][4] It is shared by Ukrainian міч (mič), Old Church Slavonic мошть (moštĭ, “strength, power”), Bulgarian мощ (mošt), Czech moc (“a great deal”) and Polish moc.[14][4] Vasmer derives it from *mogǫ (“I can”), the verb мочь1.[14] ESRJa suggests it may be formed from Proto-Slavic *moga (“strength”), as in подмога and вельможа.[4] Tsyganenko instead takes the infinitive *mogti to be a frozen dative of this noun.[6]

Its closest cognate is the Germanic noun Proto-Germanic *mahtiz, seen in Gothic 𐌼𐌰𐌷𐍄𐍃 (mahts, “might”) and Old High German maht;[14] Wiktionary reconstructs Proto-Indo-European *mógʰtis.[1] Vasmer finds no ground for a Germanic loan.[14] мощь is the Church Slavonic form of the same word.[1][15]

Earliest recorded meaning

The First Novgorod Chronicle has it under 1224, of the Polovtsians' defeat: и тоу имъ не бы мочи “and there they had no strength (to resist)”.[15] Chernykh also cites the Novgorod chronicle under the year 6732 (1224).[3]

Semantic evolution

Old Russian used the word for physical strength and also, in a south-western charter of 1388, for authority.[15] In the modern language it is low colloquial and lives in fixed phrases: что есть мочи and изо всей мочи “with all one's might”, мочи нет “it is unbearable”.[11][16]

Timeline

  • 1224 – мочи “strength” in the First Novgorod Chronicle (13th–14th-century manuscript).[15]
  • 1388 – “authority” in a charter.[15]

Meanings

Noun

  1. (low colloquial) strength, might, the ability to do something, mostly in set phrases.[11][16]

Word family

  • немочь
  • невмочь
  • мощь
  • могущество
  • подмога
  • Old Church Slavonic мошти (mošti)

References

  1. ^ a b c d e f g h i j Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e Vasmer, Max (1964–1973), Ètimologičeskij slovar' russkogo jazyka, transl. and suppl. by O. N. Trubačev, 4 vols., Moskva: Progress, p. 2, 635–636
  3. ^ a b c d e f g h Chernykh, P. Ya. (1993), Istoriko-ètimologičeskij slovar' sovremennogo russkogo jazyka [Историко-этимологический словарь современного русского языка], 2 vols., Moskva: Russkij jazyk, p. 1, s.v. мочь
  4. ^ a b c d e Shansky, N. M.; Zhuravlev, A. F. (eds.) (1963–2007), Ètimologičeskij slovar' russkogo jazyka [Этимологический словарь русского языка], vols. 1–10 (A–M), Moskva: Izdatel'stvo Moskovskogo universiteta, p. 10, s.v. мочь
  5. ^ Shansky, N. M.; Bobrova, T. A. (2004), Škol'nyj ètimologičeskij slovar' russkogo jazyka [Школьный этимологический словарь русского языка], 7th ed., Moskva: Drofa, p. s.v. мочь
  6. ^ a b Tsyganenko, G. P. (1989), Ètimologičeskij slovar' russkogo jazyka [Этимологический словарь русского языка], 2nd ed., Kiev: Radjans'ka škola, p. s.v. мочь
  7. ^ a b c d e f Shaposhnikov, A. K. (2010), Ètimologičeskij slovar' sovremennogo russkogo jazyka [Этимологический словарь современного русского языка], 2 vols., Moskva: Flinta / Nauka, p. 1, 539
  8. ^ Sorokin, Yu. S. et al. (eds.) (1984–), Slovar' russkogo jazyka XVIII veka [Словарь русского языка XVIII века], vols. 1–24, Leningrad / Sankt-Peterburg: Nauka, p. s.v. мочь
  9. ^ a b Filin, F. P.; Sorokoletov, F. P.; Myznikov, S. A. (eds.) (1965–), Slovar' russkix narodnyx govorov [Словарь русских народных говоров], vols. 1–51, Moskva / Leningrad / Sankt-Peterburg: Nauka, p. 18, 321
  10. ^ Dal', V. I. (1880–1882), Tolkovyj slovar' živago velikorusskago jazyka [Толковый словарь живаго великорусскаго языка], 2nd ed., 4 vols., Sankt-Peterburg / Moskva: M. O. Vol'f, p. s.v. мочь
  11. ^ a b c d Ozhegov, S. I.; Shvedova, N. Yu. (1997), Tolkovyj slovar' russkogo jazyka [Толковый словарь русского языка], 4th ed., Moskva: Azbukovnik, p. s.v. мочь
  12. ^ Evgen'eva, A. P. (ed.) (1981–1984), Slovar' russkogo jazyka v četyrex tomax [Словарь русского языка в 4 тт.] (MAS), 2nd ed., Moskva: Russkij jazyk, p. s.v. мочь
  13. ^ Kuznetsov, S. A. (ed.) (1998), Bol'šoj tolkovyj slovar' russkogo jazyka [Большой толковый словарь русского языка], Sankt-Peterburg: Norint, p. s.v. мочь
  14. ^ a b c d e Vasmer, Max (1964–1973), Ètimologičeskij slovar' russkogo jazyka, transl. and suppl. by O. N. Trubačev, 4 vols., Moskva: Progress, p. 2, 667
  15. ^ a b c d e Avanesov, R. I. et al. (eds.) (1988–), Slovar' drevnerusskogo jazyka (XI–XIV vv.) [Словарь древнерусского языка (XI–XIV вв.)], vols. 1–13, Moskva: Russkij jazyk / Azbukovnik, p. 5, 79
  16. ^ a b Efremova, T. F. (2000), Novyj slovar' russkogo jazyka. Tolkovo-slovoobrazovatel'nyj [Новый словарь русского языка. Толково-словообразовательный], 2 vols., Moskva: Russkij jazyk, p. s.v. мочь

Related etymologies

  • вода · also from Old East Slavic
  • быть · also from Old East Slavic
  • с · also from Old East Slavic
  • на · also from Old East Slavic
  • в · also from Old East Slavic
  • и · also from Old East Slavic
  • что · also from Old East Slavic
  • не · also from Old East Slavic
Cite this entry

“Мочь.” Etymologically, 31 Oct. 2026, etymologically.com/ru/%D0%BC%D0%BE%D1%87%D1%8C. Accessed 31 Oct. 2026.

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