A seven letter word that means most favorable is favorite.
optimal
tritest
By definition, favorable is: expressing approval, giving consent, helpful, encouraging, advantageous. To be the most favorable would then mean the most approving, helpful, encouraging (& so on). Example: "a most favorable wind", "I've just received the most favorable answer".
The Treaty of Paris is more favorable to the United States.
confuse
Gravest.
It is the most fertile
cold
decision making
"Most likely" means "most favorable." If there was a bag of marbles with 6 blue marbles and 1 red marble, it would be most likely that you would draw a blue marble rather than a red, because there are more of them.
wetland, bottoms
Most likely it means you have a seven-shaped wrinkle in your hand. It means nothing.
Tex-Mex is the most common. It is a mix of the Texan and Mexican cooking cultures.