sage
/sāj/
noun
- One venerated for experience, judgment, and wisdom.
- Any of various plants of the genus Salvia of the mint family, especially S. officinalis, having aromatic grayish-green leaves.
- The leaves of S. officinalis used as a seasoning.
As it is shown here: https://www.etymonline.com/word/sage#etymonline_v_22601
I do not entirely understand the leap from Gallo-Roman *sabius to Old French sage. I tried to figure it out on my own earlier and had a rough idea, but I figured I would also ask because my idea is probably reaching.
EDIT (ripped from comments):
It appears as though I've answered this myself:
https://books.google.com/books?id=X5dDAQAAMAAJ&pg=PA5#v=onepage&q&f=false
https://books.google.com/books?id=tVkzAAAAQBAJ&lpg=PP1&pg=PA115#v=onepage&q&f=false
I couldn't find an explanation for the rule at the time, but I guess in a clearer mind I found it this time and it makes sense now. I also skipped over the relevant rules places like here: https://en.wikipedia.org/wiki/Phonological_history_of_French#Chronological_history
Not much of a researcher myself.
According to my googling, the plant sage comes from the Latin salvia while the wise teacher defintion stems from the Latin sapere. These were both adopted in Old French before both arriving in there current form in Middle English. Is there any relation between the two or is the similarity a coincidence?
I apologize for any grevious errors I have made in attempting to explain this. Please do not let my ignorance offend you. Thanks!