Synset

showing extreme courage; especially of actions courageously undertaken in desperation as a last resort
<adj.all>   freq. cnt.: 1 freq. cnt.: 1

desperate

heroic

sample sentences

"made a last desperate attempt to reach the climber"
"the desperate gallantry of our naval task forces marked the turning point in the Pacific war"- G.C.Marshall
"they took heroic measures to save his life"