- crasis
[crasis 词源字典]
- "A contraction of two adjacent vowels into one long vowel or diphthong, for example the reduction of words in ancient Greek from three syllables to two", Mid 16th century (as a medical term denoting the blending of physical qualities giving rise to a particular state of health): from Greek krasis 'mixture'.[crasis etymology, crasis origin, 英语词源]