Etymologically

insecurus

Etymology and origin of the Latin word insecurus

Confidence
Established
Formation
Derivation
First attested
before 1350
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 insecurus
English insecure
From the same root
Latin incuria ← cura
Latin assecuro ← securus
Latin secure ← securus
Latin securitas ← securus
French sûrement ← sûr
Italian sicuramente ← sicuro
Italian sicurezza ← sicuro
German Sicherheit ← sicher

Forms

īnsēcūrus (feminine īnsēcūra, neuter īnsēcūrum); first/second-declension adjective[1][2]

Etymology

It is from Latin in-2 (“not”) + sēcūrus (“free from care, safe”), a Medieval Latin formation.[2][3][1] English insecure was taken from it.[4]

Earliest recorded meaning

The MLW's earliest example is from Heiric's life of Germanus, where a crowd obeys orders although it is “insecura”, unsure.[2]

Semantic evolution

Medieval writers used it of people who were unsure or wavering[2] and of things that were unsafe: Thomas Bradwardine calls an anchor badly placed more insecurus than anything,[3] and in Albertus Magnus' commentary on Aristotle's Politics it renders Ancient Greek ἐπισφαλής (episphalḗs, “precarious”).[2] In the Latin of Poland it meant anxious or frightened, of people, and turbulent or dangerous, of places.[5]

Timeline

  • before 1350 – British Medieval Latin sources record it, according to Latham's word list.[1]
  • 1448 – A Polish letter speaks of loca insecura, dangerous places with a threat of hostility.[5]
  • 1505 – A Polish court record uses it of a frightened man.[5]
  • 1640s – English borrows it as insecure.[4]

Meanings

Adjective

  1. (Medieval Latin) Unsure, wavering, irresolute.[2][5]
  2. (Medieval Latin) Unsafe, unsecured; dangerous.[3][5][1]
  3. (Medieval Latin) Not assured, doubtful.[3]

References

  1. ^ a b c d Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  2. ^ a b c d e f Mittellateinisches Wörterbuch bis zum ausgehenden 13. Jahrhundert (1967–), Munich: C. H. Beck; Bayerische Akademie der Wissenschaften
  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 Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  5. ^ a b c d e Lexicon mediae et infimae Latinitatis Polonorum (1953–), Kraków: Instytut Języka Polskiego PAN; electronic ed. elexicon.scriptores.pl

Borrowed into

Cite this entry

“Insecurus.” Etymologically, 25 Oct. 2026, etymologically.com/la/insecurus. Accessed 25 Oct. 2026.

Last edited on . ·