farthest or furthest Traditionally, farther and farthest were used in referring to physical distance: the falls were still two or three miles farther up the path. Further and furthest were restricted to figurative or abstract senses: we decided to consider the matter further.
No, "furtherest" is not a standard word in English. The correct superlative form of "far" is "furthest."
The superlative form of genuine is more genuine.
far and far and far
the farthest
No, the superlative form is "gentlest."
Comparative: uglier Superlative: ugliest
farthest
Smoothest is the superlative form of the word smooth. The comparative form is smoother.
farthest
If splendidest was a word, it would be a superlative. The comparative form of splendid is more splendid, the superlative form is most splendid.
The superlative for the word generous is most generous.
The comparative form of the word "cheap" is "cheaper." The superlative form is "cheapest."