Etymologically

Etymology and origin of the Latin word phasis

Confidence
Established
Formation
Borrowing
First attested
c. 300 AD, Chalcidius
Borrowed from
Ancient Greek φάσις
Ultimate origin
Ancient Greek φάσις
Etymology tree
inherited borrowed derived
Ancient Greek φαίνω
Ancient Greek φάσις
Italian fase
Latin phasis
From the same root
English epiphany ← φαίνω
English sycophant ← φαίνω

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

  1. (Late Latin) An appearance, what is seen directly.[3][2]
  2. (Late Latin, rhetoric) A statement or assertion.[3]
  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

  1. ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  3. ^ 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
  4. ^ a b c d e Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  5. ^ a b Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  6. ^ Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  7. ^ 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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