Etymology and origin of the Latin word phasis
Etymology tree
Forms
phasis f (genitive phasis); third declension[1]
Etymology
It is borrowed from Ancient Greek φάσις (phásis, “appearance, rising of a star; statement”),[2][3][4] from the stem of φαίνω (phaínō, “to show, make appear”).[4][3] Wiktionary traces it to Proto-Indo-European *bʰeh₂- (“to shine”);[1] Köbler names that root and, for the sense “statement”, a homonymous root meaning “to speak”.[2]
Earliest recorded meaning
Köbler's first source is Chalcidius (c. 300 AD).[2] The TLL's first sense is a technical term of vision, for what is seen simply and directly as opposed to what is seen in mirrors.[3]
Semantic evolution
In rhetoric and logic it rendered the Greek term for a statement: the rhetorical treatise the TLL cites under Augustine's name divides it into affirmation and denial, a minor rhetorician calls it the matter from which a question arises, and Boethius translates it as dictio.[3] In New Latin it meant an appearance and a phase, as of the moon;[1] English phase was made from its plural phases.[4]
Timeline
- c. 300 AD – Chalcidius has the word.[2]
- early 6th century AD – Boethius renders it as dictio.[3][2]
- 1705 – English forms phase from the New Latin plural phases.[4]
Meanings
Noun
- (Late Latin) An appearance, what is seen directly.[3][2]
- (Late Latin, rhetoric) A statement or assertion.[3]
- (New Latin) A phase, as of the moon or a planet.[1][4]
Usage notes
It is not the same word as Phāsis, the river of Colchis flowing into the Black Sea, which Catullus already names,[5][6] from which the phāsiānus (“pheasant”) took its name;[7][2] the OLD also has an adjective Phāsis “Colchian”, used as a noun for Medea.[5] The TLL records a third phasis, an adjective meaning “of the pheasant”, in Martial.[3][2]
References
- ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ a b c d e f g h Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
- ^ a b c d e f g h Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
- ^ a b c d e Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
- ^ a b Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
- ^ Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
- ^ 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
Related etymologies
Cite this entry
“Phasis.” Etymologically, 24 Oct. 2026, etymologically.com/la/phasis. Accessed 24 Oct. 2026.
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