Stalwart is a passive skill in The Elder Scrolls Online. This skill reduces Stamina cost of Blocking by 80.
Originally primarily a One Hand and Shield skill, it is now also a Nord passive skill also. 
- U2, as of Update 2, This Khajiit, Nord, and Orc, passive bonus has been increased from 5% (Rank I), 10% (Rank II), and 15% (Rank III) to 10% (Rank I), 20% (Rank II), and 30% (Rank III). 
- U11: As of Update 11, the Nord passive Robust, has been renamed to Stalwart.