Etymologically

Etymology and origin of the Portuguese word presumir

Confidence
Established
Formation
Borrowing
First attested
1200s a text Houaiss cites as InedAlc, spelt presume More words from the 13th century
Borrowed from
Latin praesumo
Ultimate origin
Latin sūmō
Etymology tree
inherited borrowed derived
Latin emō
Latin sūmō
Latin praesūmō
Portuguese presumir
Spanish presumir
From the same root
Latin adimō ← emō
Latin coëmō ← emō
Latin cōmō ← emō
Latin dēmō ← emō
Latin dirimō ← emō
Latin em ← emō
Latin ēmptiō ← emō
Latin ēmptor ← emō
Latin exemplum ← emō
Latin exēmptus ← emō
Latin eximō ← emō
Latin interimō ← emō
Latin praemium ← emō
Latin prōmō ← emō
Latin redimō ← emō
Spanish ejemplo ← emō
Latin absūmō ← sūmō
Latin assūmō ← sūmō
Latin cōnsūmō ← sūmō
Latin dēsūmō ← sūmō
Latin īnsūmō ← sūmō
Latin resūmō ← sūmō
Latin sūmptus ← sūmō
Latin praesūmptiō ← praesūmō

Pronunciation

  • Brazil: /pɾe.zuˈmi(ʁ)/, [pɾe.zuˈmi(h)][1]
  • São-Paulo: /pɾe.zuˈmi(ɾ)/[1]
  • Rio-de-Janeiro: /pɾe.zuˈmi(ʁ)/, [pɾe.zuˈmi(χ)][1]
  • Caipira: /pɾe.zuˈmi(ɻ)/[1]

Forms

presumir (first-person singular present presumo, first-person singular preterite presumi, past participle presumido)[1] Houaiss records the medieval spellings presume (13th century), presomiam and prosumir (15th century).[2]

Etymology

It is borrowed from Latin praesūmō (“to take beforehand; to anticipate, suppose”).[2][3][1] Nascentes calls it a semi-learned word and glosses the Latin verb “to take in advance”.[4][5] It corresponds to Spanish presumir.[6]

The Latin verb is formed from prae- (“before”) and sūmō (“to take”).[7][1] Its first sense was concrete, “to consume beforehand”, and the senses “to suppose, take for granted” and “to venture, dare” came later.[7][8][9] Wiktionary traces the simple verb back to *emō, from Proto-Indo-European *h₁em- (“to take”), and gives an earlier form *susmō from a compound with *sups- “under, up”.[1]

Earliest recorded meaning

Houaiss dates the verb to the 13th century, from a text he cites as InedAlc, in the spelling presume;[2][3] Cunha gives the 14th century.[2][3] The first sense he lists is “to draw a conclusion in advance, from signs and conjectures rather than proven facts”.[2]

Semantic evolution

The early dictionaries give the verb only the sense “to conjecture, suspect”: Cardoso (1569) renders it with Latin coniecto, Barbosa (1611) with coniicio and suspicor, and Bluteau with “to persuade oneself of something from signs or conjectures” and “to judge”.[10][11][12] Bluteau's examples are legal: what may or may not be presumed of a man who defended himself with arms.[12]

The intransitive and reflexive sense “to be conceited, to boast of oneself” is recorded by Silva Bastos in 1912 and is listed by Houaiss, Michaelis and the Porto dictionary today; it matches the sense of the noun presunção.[2][13][14][15] The participle presumido is dated 1813 by Cunha.[3]

Timeline

  • 13th century – presume in a text Houaiss cites as InedAlc.[2]
  • 14th century – Cunha's date for the verb.[3]
  • c. 1450 – presumir in the Livro das três virtudes (witness after 1450).[16]
  • 15th century – the spellings presomiam and prosumir.[2]
  • 1569 – Cardoso's dictionary glosses the verb with Latin coniecto “I conjecture”.[10]
  • 1588 – presume in a private letter.[17]
  • 1611 – Barbosa adds the senses “to suppose, suspect”.[11]
  • 1813 – first record of the participle presumido.[3]
  • 1858 – first record of presumível.[18][3]

Meanings

Verb

  1. (transitive) To presume, to conjecture: to conclude in advance from signs rather than from proof: Presumo que o comboio vem atrasado.[2][19][20]
  2. (transitive) To suppose beforehand; to foresee, presuppose.[2][19]
  3. (transitive) To suspect, to distrust.[2][19][15]
  4. (transitive) To imagine without real grounds.[2]
  5. (intransitive, reflexive, with de) To be conceited, to boast of being something: presumir de poeta.[2][20][14]

Word family

  • presumível
  • presumido

References

  1. ^ a b c d e f g h Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. presumir
  3. ^ a b c d e f g Cunha, Antônio Geraldo da (2010), Dicionário etimológico da língua portuguesa, 4th ed., Rio de Janeiro: Lexikon, p. s.v. presumir
  4. ^ Nascentes, Antenor (1966), Dicionário etimológico resumido, Rio de Janeiro: Instituto Nacional do Livro, p. s.v. presumir
  5. ^ Nascentes, Antenor (1955), Dicionário etimológico da língua portuguesa, vol. 1: Nomes comuns, Rio de Janeiro (1st ed. 1932, preface by W. Meyer-Lübke), p. 415
  6. ^ Real Academia Española; Asociación de Academias de la Lengua Española (2014–), Diccionario de la lengua española, 23rd ed., online version 23.8, https://dle.rae.es, p. s.v. presumir
  7. ^ a b Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  8. ^ Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press, p. s.v. praesumo
  9. ^ Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill, p. s.v. praesumere
  10. ^ a b Cardoso, Jerónimo (1569–1570), Dictionarium ex lusitanico in latinum sermonem, Lisboa: João Álvares (CLP transcription, Universidade de Aveiro), p. s.v. presumir
  11. ^ a b Barbosa, Agostinho (1611), Dictionarium lusitanicolatinum, Braga: Fructuoso Lourenço de Basto (CLP transcription, Universidade de Aveiro), p. s.v. presumir
  12. ^ a b Bluteau, Raphael (1712–1728), Vocabulario portuguez e latino, 8 vols. + 2 supplement vols., Coimbra / Lisboa (CLP transcription, Universidade de Aveiro), p. s.v. presumir
  13. ^ Silva Bastos, José Timóteo da (1912), Diccionario etymologico, prosodico e orthographico da lingua portugueza, Lisboa: Parceria António Maria Pereira, p. s.v. presumir
  14. ^ a b Michaelis: Moderno Dicionário da Língua Portuguesa, São Paulo: Melhoramentos (online as Michaelis Dicionário Brasileiro da Língua Portuguesa, https://michaelis.uol.com.br), p. s.v. presumir
  15. ^ a b Porto Editora (2013), Grande Dicionário da Língua Portuguesa, Porto: Porto Editora, p. 7460
  16. ^ Centro de Linguística da Universidade de Lisboa, CTA – Corpus de Textos Antigos, https://teitok.clul.ul.pt/cta, p. s.v. presumir
  17. ^ CLUL (ed.) (2014), P.S. Post Scriptum: Arquivo Digital de Escrita Quotidiana em Portugal e Espanha na Época Moderna, Lisboa: Centro de Linguística da Universidade de Lisboa, http://ps.clul.ul.pt, p. s.v. presumir
  18. ^ Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. presumível
  19. ^ a b c Ferreira, Aurélio Buarque de Holanda, Novo dicionário Aurélio da língua portuguesa, digital edition, p. s.v. presumir
  20. ^ a b Dicionário Priberam da Língua Portuguesa, Lisboa: Priberam Informática, https://dicionario.priberam.org, p. s.v. presumir

Related etymologies

Cite this entry

“Presumir.” Etymologically, 15 Nov. 2026, etymologically.com/pt/presumir. Accessed 16 Nov. 2026.

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