steadfast
     adj 1: marked by firm determination or resolution; not shakable;
            "firm convictions"; "a firm mouth"; "steadfast
            resolve"; "a man of unbendable perseverence";
            "unwavering loyalty" [syn: {firm}, {steady}, {unbendable},
             {unfaltering}, {unshakable}, {unwavering}]
     2: firm and dependable especially in loyalty; "a steadfast
        ally"; "a staunch defender of free speech"; "unswerving
        devotion"; "unswerving allegiance" [syn: {staunch}, {unswerving}]
Source: WordNet® 2.0