Etymology and origin of the Latin word infamosus
- Confidence
- Established
- Formation
- Derivation
- First attested
- 12th century
- Ultimate origin
- Latin īnfāmis
From the same root
Forms
īnfāmōsus (feminine īnfāmōsa, neuter īnfāmōsum); first/second-declension adjective[1]
Etymology
It is from Latin īnfāmis (“disreputable, infamous”) + -ōsus (“full of”).[1][2] Etymonline analyses it instead as in- (“not”) and fāmōsus (“celebrated”).[3]
Earliest recorded meaning
It is a Medieval Latin word;[2][1] Köbler's first record of it in British sources is from the 12th century.[2][1]
Semantic evolution
It meant “of ill repute, notorious”, of people and of places:[4][1] a manual of procedure in the DMLBS speaks of an accused man seen at night with a suspect or disreputable woman, and a letter describes “most infamous places” that look more like a Stygian marsh than land.[4] In a Polish source it is “slanderous”: Dioscorus, it says, wrote a defamatory pamphlet against the pope, calling him a rotten head.[5]
It is the source of Middle English infamous, at first “not well known” (early 15th century); in the 16th century that word merged with infamis, “of ill repute”, borrowed from Latin īnfāmis, into the English infamous.[3][1]
Timeline
- 12th century – Köbler's first record in British sources.[2]
- early 15th century – Middle English infamous is borrowed from it.[3][1]
- 16th century – English infamous takes on the sense “of ill repute”.[3]
Meanings
Adjective
- (Medieval Latin) Of ill repute, notorious, infamous (of people and places).[4][1][2]
- (Medieval Latin) Defamatory, slanderous.[5]
Related words
References
- ^ a b c d e f g h i j Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ a b c d e Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
- ^ a b c d Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
- ^ a b c 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
- ^ a b Lexicon mediae et infimae Latinitatis Polonorum (1953–), Kraków: Instytut Języka Polskiego PAN; electronic ed. elexicon.scriptores.pl
Borrowed into
- English infamous
Cite this entry
“Infamosus.” Etymologically, 24 Oct. 2026, etymologically.com/la/infamosus. Accessed 24 Oct. 2026.
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