staunch


staunch (http://definr.com/staunch)

     adj : firm and dependable especially in loyalty; "a steadfast
           ally"; "a staunch defender of free speech"; "unswerving
           devotion"; "unswerving allegiance" [syn: steadfast, unswerving]
     v : as of the flow of a liquid flowing, such as blood from a
         wound [syn: stem, stanch, halt]