New World's gear system contains a Affix system. The affix will tell you by the name of the armor, weapon, or jewelry what the primary and secondary attribute of the armor will be. For example, if a piece of armor contains the word "Knight" as the suffix then the armor will have Constitution as the primary attribute bonus and Strength as the secondary attribute bonus. The same holds true for weapons and jewelry.
Below is a quick chart of all the Affix's in New World.