Etymology and origin of the Latin word monstruosus
- Confidence
- Established
- Formation
- Derivation
- First attested
- 81–43 BC, Cicero
- Ultimate origin
- Latin mōnstrum
Etymology tree
Forms
mōnstruōsus (feminine mōnstruōsa, neuter mōnstruōsum); first/second-declension adjective[1] Also spelled mōnstrōsus.[2][3] The TLL finds the longer form the more usual, and the shorter the only reading in a few places, such as a passage of Seneca;[3] Lewis & Short call the shorter form post-classical.[4]
Etymology
It is from Latin mōnstrum (“portent, monster”) + -ōsus.[2][3][1] The TLL compares portentōsus, formed in the same way from a word for an omen.[3]
Earliest recorded meaning
Cicero is the first to use it, in On Divination, where he calls the ape illam mōnstruōsissimam bestiam, “that most unnatural beast”.[2][4][5] In the same work he has the adverb mōnstruōsē “in an unnatural way”.[4]
Semantic evolution
Its first sense is of what is portentous or ill-omened, but it is mostly used of what goes against nature: deformed births,[2][6] mutilated bodies and strange diseases in Seneca,[6] unnatural lusts in Suetonius.[4][6] It also came to mean simply strange or astonishing: Petronius has a dish longē mōnstruōsius “far more extraordinary”,[4] Suetonius calls a grammarian mōnstruōsus vītā scrīptīsque,[4] and Macrobius speaks of a pearl of monstrous size.[6]
Medieval writers used it of abnormal births and of anything contrary to the natural order,[7] and of monsters themselves, such as a sea beast.[7] English took ⟨monstruous⟩ in the late 14th century, through Old French and directly from Late Latin; ⟨monstrous⟩ followed in the mid-15th century.[8]
Timeline
- 81–43 BC – Cicero calls the ape a most unnatural beast.[2][4][5]
- 4 BC–65 AD – Seneca uses it of deformed bodies and diseases.[6][5]
- before 66 AD – Petronius uses the comparative of a dish at a banquet.[4][5]
- c. 75–c. 150 AD – Suetonius uses it of unnatural lusts and of a strange life.[4][6][5]
- 1st half of the 5th century AD – Macrobius speaks of a pearl of monstrous size.[6][5]
- late 14th century – English borrows it as ⟨monstruous⟩.[8]
Meanings
Adjective
- Portentous, ill-omened.[2]
- Against nature, unnatural, monstrous.[2][4][6]
- Strange, extraordinary.[6][4]
- (Medieval Latin) Of or like a monster.[7]
Word family
- monstrositas
References
- ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ a b c d e f g Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
- ^ a b c d Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
- ^ a b c d e f g h i j k Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
- ^ a b c d e f Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
- ^ a b c d e f g h i Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
- ^ 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 Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
Cite this entry
“Monstruosus.” Etymologically, 23 Oct. 2026, etymologically.com/la/monstruosus. Accessed 23 Oct. 2026.
Last edited on . ·