Teaching

 Introduction to Koine Greek Grammar

By Maduabuchi Okoro

Larry Griag West Africa Theological School

Chapter 1: Foundations of Koine Greek Grammar

1.1 What Is Koine Greek?

Koine Greek (“κοινή,” meaning “common”) was the everyday language of the Greek-speaking world from roughly 300 BCE to 300 CE. It was the lingua franca of the Eastern Mediterranean and the original language of the New Testament. Simpler than Classical Greek yet rich in nuance, Koine served as a unifying medium for trade, governance, and religious writing.

1.2 The Greek Alphabet

Koine Greek uses 24 letters. Here is a table of the alphabet:

Uppercase Lowercase Name Pronunciation

Α α Alpha a as in father

Β β Beta b as in book

Γ γ Gamma g as in go

Δ δ Delta d as in day

Ε ε Epsilon e as in met

Ζ ζ Zeta z as in maze

Η η Eta ē as in they

Θ θ Theta th as in thin

Ι ι Iota i as in bit/beet

Κ κ Kappa k as in kite

Λ λ Lambda l as in leaf

Μ μ Mu m as in man

Ν ν Nu n as in now

Ξ ξ Xi x as in axe

Ο ο Omicron o as in hop

Π π Pi p as in pot

Ρ ρ Rho r as in row

Σ σ/ς Sigma s as in sun

Τ τ Tau t as in top

Υ υ Upsilon u as in flute

Φ φ Phi ph as in phone

Χ χ Chi ch as in Bach

Ψ ψ Psi ps as in lips

Ω ω Omega ō as in note

1.3 Breathing Marks and Accents

Greek words beginning with a vowel have breathing marks:

῾ Rough breathing (adds an “h” sound): ἁ = ha

᾿ Smooth breathing (no sound): ἀ = a

Greek also uses accents to mark pronunciation. These do not usually affect meaning in Koine.

1.4 Nouns and Cases

Koine Greek is an inflected language. That means the form of a word changes depending on its role in the sentence.

There are five cases:

Nominative – subject of the sentence (e.g., ὁ λόγος = "the word")

Genitive – possession (τοῦ θεοῦ = "of God")

Dative – indirect object or means (τῷ ἀνθρώπῳ = "to the man")

Accusative – direct object (τὸν λόγον = "the word")

Vocative – direct address (ἀδελφέ! = "Brother!")

1.5 Articles

Greek has a definite article (the), but no indefinite article (a/an). The article matches the noun in case, number, and gender.

Case Masculine Feminine Neuter

Nominative ὁ ἡ τό

Genitive τοῦ τῆς τοῦ

Dative τῷ τῇ τῷ

Accusative τὸν τὴν τό

1.6 Verb Overview

Greek verbs express:

Tense (time/aspect): e.g., present, aorist, perfect

Voice (subject’s relationship to action): active, middle, passive

Mood (the manner of action): indicative, imperative, subjunctive, optative

Person and Number: 1st, 2nd, 3rd person (singular/plural)

Example:

λύω – “I release”

Present tense, active voice, indicative mood, 1st person singular.

                                  BASIC KOINE GREEK PHONOLOGY 

Koine Greek phonology refers to the system of sounds used in the Koine dialect of Ancient Greek, which was the common spoken form from roughly 300 BCE to 300 CE. It developed from Classical Attic Greek and eventually transitioned toward Medieval and Modern Greek.

Here’s an overview of Koine Greek phonology, including consonants, vowels, diphthongs, accents, and phonological changes from Classical Greek.

1. Vowel System

By the Koine period, several vowel mergers were underway, a process known as iotacism (the merging of many vowels and diphthongs into the sound [i]).

Monophthongs

Letter Classical Pronunciation Koine Approx. Example

  α                   [a]                                         [a]             ἀνήρ (man)

  ε                   [e] (short)                         [e]                 ἐν (in)

   η                   [ɛː] → [i]                         [i]               ἡμέρα (day)

   ι                     [i]                                         [i]               ἰχθύς (fish)

   ο                 [o] (short)                           [o]               ὁ (the)

   υ                 [y] → [i]                                   [i]                 ὕδωρ (water)

  ω                 [ɔː] → [o]                           [o]                 ὥρα (hour)

Key Koine vowel changes:

η, υ, ει, οι, and ι all came to be pronounced as [i]

ω and ο merged to [o]

η and ι became indistinguishable (iotacism)

2. Diphthongs

By the Koine period, many diphthongs had monophthongized:

Diphthong Classical Koine Change Notes

 αι                   [ai̯] [e] or [ɛ] →  [e]     Merged with ε

  ει                   [ei̯]               [i] Merged with ι

   οι.               [oi̯] [y] →             [i] Merged with ι

  αυ               [au̯]                 [av] or [af] Like Modern Greek

   ευ               [eu̯]               [ev] or [ef] Like Modern Greek

   ου       [ou̯]                 [u] Similar to “oo” in “boot”

3. Consonants

Some significant changes occurred from Classical to Koine:

Voiced stops became fricatives:

Letter Classical Koine           Example

β           [b].              [v]             βιβλίον (book)

γ         [g]               [ɣ] or [ʝ]     γῆ (earth), γίγνομαι

δ         y[d].             [ð] (like th in this)   διδάσκω

Aspirated stops became fricatives:

Letter Classical Koine                       Example

φ           [pʰ]         [f]                             φωνή (voice)

θ           [tʰ].         [θ] (like th in think) θεός (God)

χ         [kʰ]       [x] or [ç] (like German Bach) χάρις (grace)

Other consonants:

ζ: [zd] or [z]

ρ: [r] (trilled or tapped)

ν before γ, κ, ξ, χ = pronounced as [ŋ] (like "ng" in sing)

4. Accent

Classical Greek had a pitch accent (musical tone).

Koine Greek shifted toward a stress accent, similar to modern European languages.

This meant that instead of pitch variation, one syllable became louder or more emphasized.

🔄 5. Summary of Major Changes from Classical to Koine

Feature Classical Greek Koine Greek

Vowel quantity (long vs short) Distinct Lost

Pitch accent Yes Replaced by stress accent

Voiced stops (β, γ, δ) [b], [g], [d] [v], [ɣ], [ð]

Aspirated stops (φ, θ, χ) [pʰ], [tʰ], [kʰ] [f], [θ], [x]

Diphthongs True diphthongs Mostly monophthongized

η, υ, ει, οι → [i] No Yes (iotacism)