Morphology: Formation of perfect stem

 
Verb starts with a single consonant
or
consonant + λ or ρ:

 
Reduplication of the initial consonant + ε
+ present tense stem
+ κ inserted before the personal endings:
 
λύ-ω
πονέ-ω
τιμά-ω
πληρό-ω
φιλέ-ω
θραύ-ω
χορεύ-ω
  -  
  -  
  -  
  -  
  -  
  -  
  -  
λέ
πε
τε
πε
πε
τέ
κε
λυκα
πόνηκα
τίμηκα
πλήρωκα
φίληκα
θραυκα
χόρευκα
     I have loosened
 I have worked hard
 I have honoured
 I have filled
 I have loved or kissed
 I have broken
 I have danced
 
 Why? :
  1. πεπόνηκα
    τετίμηκα
    πεπλήρωκα
    ?
    - Because the end vowels
    -ε -α lengthen to and
    -ο lengthens to .
  2. πεφίληκα ? φ corresponds to ph, i.e. aspirated p. Only the first letter π is reduplicated. The letter is reduplicated, not the aspiration.
  3. τέθραυκα? Same as above, θ, being th, τ is reduplicated, not the aspiration.
  4. κεχόρευκα? χ represents kh, the letter to be reduplicated is the unaspirated letter κ.