UW – Unique Weapon. A weapon with a unique effect that can be equipped only by a specific hero.
UT(UT2/3) – Unique Treasure(2nd/3rd). A treasure with a unique effect that can be equipped only by a specific hero.
BD – Black Dragon. A type of raid. Drops gear that, unless you got a specific game-play on your mind, you want to farm this one.
ID – Ice Dragon. A type of raid. Drops gear you’d want to equip on a tank.
FD – Fire Dragon. A type of raid.
PD – Poison Dragon. A type of raid. P.Crit Res is a kinda endgame PvP stat, avoid if you are a new player.
WB(1/2) – World Boss(Proteanus/Fortress). Competitive PvE.
GC – Guild Conquest. PvE guild wars.
GR – Guild Raid. Guild activity.
ToC – Tower of Challenge. Resets every 1st day of the month. Multiple re-playable floors. You get artifacts from here.
ToO – Tower of Ordeals. Resets every Monday. 25 non repeatable floors.
LoH – League of Honor. PvP.
LoV – League of Victory. PvP
Amp – The act of amplifying a character’s damage.
Shred – The act of decreasing a character’s defence.
CC – Crowd Control. (Stun, slow, silence etc)
Dispel – The act of removing an enemy’s or ally’s buffs/debuffs.
T(X) – Transcendence(1-5).
If you want me to add anything here just say so..