Etymologically

Etymology and origin of the Latin word assecuro

Confidence
Established
Formation
Derivation
First attested
c. 1020, Hugo of Farfa
Ultimate origin
Latin sēcūrus
Etymology tree
inherited borrowed derived
Latin cura
Italian cura
Latin securus
French sûr
Italian sicuro
Dutch zeker
English secure
German sicher
Latin assecuro
From the same root
Latin incuria ← cura
Latin secure ← securus
Latin securitas ← securus
French sûrement ← sûr
Italian sicuramente ← sicuro
Italian sicurezza ← sicuro
German Sicherheit ← sicher

Forms

assecuro (present infinitive assecurare, perfect active assecuravi, supine assecuratum); first conjugation[1] Spellings include adsecuro, asecuro and assicuro.[2]

Etymology

It is from Latin ad- + sēcūrus (“free from care, safe”).[1][3][4] The MLW compares Italian assicurare and French assurer.[1]

English assure comes from Old French asseurer.[5]

Earliest recorded meaning

The MLW's earliest citation is from Hugo of Farfa, around 1020, who wanted to give certain people a guarantee about the castle of Tribuco.[1][6]

Semantic evolution

It began as a word of medieval law and politics: to promise on oath, in a peace treaty, to refrain from harming someone, to guarantee that another would do the same, and, in the oath of fidelity, to promise a feudal lord not to harm his person, property or honour.[7][1] From this came the senses “give a safe-conduct” to a traveller and “guarantee, warrant” a statement or a payment.[1][4][2]

More generally it meant to make someone sure or free from worry, and, reflexively, to feel sure or trust.[1][8] In Poland it was used of securing a sum of money on landed property.[4] Falconers used it of taming hawks.[1]

Timeline

  • c. 1020 – Hugo of Farfa uses it of a guarantee about a castle.[1][6]
  • 1174 – An Anglo-Scottish convention says the king of Scots and his barons gave their assurance.[3]
  • 1263 – A Croatian charter uses it of sending someone to the Roman curia with a sworn promise.[2]
  • 1296 – A Greater Polish charter assures a friend that he may enter their lands without fear.[4]
  • late 14th century – English has assure, from Old French.[5]

Meanings

Verb

  1. (Medieval Latin, law) To promise on oath, in a treaty of peace, to refrain from all hostility against someone.[7][1]
  2. (Medieval Latin, law) To guarantee that another person will refrain from hostility.[7]
  3. (Medieval Latin, feudal law) To promise a lord not to harm his person, property or honour, as part of the oath of fidelity.[7][1]
  4. (Medieval Latin) To give a safe-conduct to.[1][4]
  5. (Medieval Latin) To guarantee, warrant; to assure someone of something.[1][3][2]
  6. (Medieval Latin) To make safe, secure.[1][8]
  7. (Medieval Latin, reflexive) To pledge oneself; to feel sure, trust.[3][1]
  8. (Medieval Latin) To prove, attest.[2]
  9. (Medieval Latin, finance) To secure money on landed property.[4]

References

  1. ^ a b c d e f g h i j k l m n o Mittellateinisches Wörterbuch bis zum ausgehenden 13. Jahrhundert (1967–), Munich: C. H. Beck; Bayerische Akademie der Wissenschaften
  2. ^ a b c d e Bartal, Antal, et al. (1987–), Lexicon Latinitatis Medii Aevi Hungariae, Budapest: Akadémiai Kiadó; online ed. ELTE
  3. ^ a b c d Latham, R. E., D. R. Howlett, R. K. Ashdowne, et al. (1975–2013), Dictionary of Medieval Latin from British Sources, London: British Academy / Oxford University Press
  4. ^ a b c d e f Lexicon mediae et infimae Latinitatis Polonorum (1953–), Kraków: Instytut Języka Polskiego PAN; electronic ed. elexicon.scriptores.pl
  5. ^ a b Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  6. ^ a b Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  7. ^ a b c d Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill
  8. ^ a b Latinitatis medii aevi lexicon Bohemorum / Slovník středověké latiny v českých zemích (1977–), Prague: Academia; electronic version, Institute of Philosophy of the Czech Academy of Sciences
Cite this entry

“Assecuro.” Etymologically, 24 Oct. 2026, etymologically.com/la/assecuro. Accessed 24 Oct. 2026.

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