From LOTR-TCG Wiki

Hunter is a numeric Loaded Keyword that gives the Hunter character a bonus to his strength equal to the number of Hunter he has, while he is skirmishing a non-hunter character.

Gimli, Eager Hunter is skirmishing Bold Easterling. Gimli has a Strength of 6 and Hunter 3. Bold Easterling has a Strength of 8 and is a non-hunter character. In this scenario Gimli has a Strength of 9 vs Bold Easterlings 8.

Loaded Keywords
Numeric Decipher Damage + XDefender + XAmbush XHunter XToil X
Non-numeric Decipher AidArcherEnduringFierceLurkerMountedMusterRoamingSanctuaryRing-bearerUnhasty
Hobbit Draft Game Cunning
Item Class Decipher [Classless] • Support AreaArmorBroochBoxBracersCloakGauntletsHand WeaponHelmMountPalantírPhialPipeRanged WeaponRingShieldStaff