Yes, it is. (vine = La vigne...When you say "la", this is feminine)
Vine is monosyllabic.
Yes, the word vine is a singular, common, concrete noun; a word for a plant, a thing.
In French, the word "émission" is feminine.
He swung from the vine, then dropped into the lake.
"Sorte" is a feminine word.
The french word "la" is a feminine word, in fact, it is the state of all the feminine words in french.
The word 'comedie' in French is feminine.
The French word "trousse" is feminine.
The French word "brosse" is feminine.
The French word "aide" is feminine.
The Latin word for "vine" is vitis (-is, f.), which is the source of the modern word for grape-growing, "viticulture".
"Une lettre." The word is feminine.