Wealthiest.
Comparative is wealthier and the superlative is wealthiest
"economical" has no comparative or superlative form. You would say "more economical" or "most economical."
most cost-efficient
Wealth is when your are not poor, but very rich
its called "80,20" 80% own 20% of the wealth and 20% own 80% of the wealth
The superlative form of "wealthy" is "wealthiest." It is used to describe someone who possesses the most wealth compared to others in a given context. For example, one might say, "He is the wealthiest person in the city."
Sleep is a noun and does not have a superlative. Sleepy is an adjective and the superlative is "sleepiest."
The superlative for willing would be "most willing." There is no one-word superlative.
"Studying" is not a superlative, as it is not an adjective. "Most studious" is a superlative of "studious."
"Bib" is a noun and, as such, does not have a superlative form.
most superlative is the superlative form of superlative
Tallest is the superlative.
superlative of quiet
bigger is the comparativebiggest is the superlative
smallest is the superlative. (est is the standard superlative ending._
The superlative of clear is clearest.
Fattest is the superlative of fatter.