勇気はともかく、「出す」が問題です。musterが正解でmuster the courage, muster one's courageと言います。奮い立つことです。8:25 I mustered up every ounce of courage to get my parents into a room.
A Frum Survivor Tells Her Story Publicly - For the First Time
http://www.youtube.com/watch?v=sO41DltvFUM 31:10 courage is not the absence of fear, it's the mastery of it 勇気とは恐怖の欠如ではなく克服である。こちらはmasterです。
http://www.youtube.com/watch?v=HkjdCC9SUmI 2:08 by the time they would have mustered the courage to break free, no one is there to catch them.彼女たちが勇気を振り絞って（男から）逃げ出す頃には駆け込み寺はなくなっている。
http://www.youtube.com/watch?v=UUN615DO5P4 3:46 it took me the first few minutes just to muster this. 声を出す勇気がわくまで何分かかかってしまった。
http://www.youtube.com/watch?v=4jBB5iibKy0 10:12 if only we could sum up the courage. 勇気を出せさえすれば、
http://www.youtube.com/watch?v=2YAknPG6yvg 0:50 a few times, yoichi usuzawa summoned the courage to return to his home.
参考リンク
https://bridge-english.blogspot.com/2019/08/work-up-courage.html work up the courage 勇気をふり絞る
練習問題解答
a-3468 musters all her strength
a-3711 mustered up the courage
a-8328 summon superhuman courage
b-1125 muster up all her courage
