The spelling of the word "green eech" may seem confusing, but it can be explained using the International Phonetic Alphabet (IPA). The first syllable is pronounced as "ɡriːn," similar to the word "green." The second syllable is pronounced as "iːtʃ," which represents the sound "eech," similar to the word "each." Therefore, the word "green eech" is pronounced as "ɡriːn iːtʃ," and refers to a type of shrub or tree. Remembering the IPA transcription can help with correct spelling and pronunciation.
Hirudo provincialis.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.