peril, perilous

peril が名詞、perilous が形容詞。余計なことだが、副詞は perilously だ。0:19 Whose broad stripes and bright stars through the perilous fight, o'er the ramparts we watched, were so gallantly streaming?

Star Spangled Banner - A Cappella
https://www.youtube.com/watch?v=7d1T4KlS2fw  0:30 perilous crossing at this knife-like ridge
Risking An 8550ft Drop: Thrillseekers Walk Along Treacherous Mountain Path
https://www.youtube.com/watch?v=IS--U3h3ev4  2:53 the perils of war photography 戦場カメラマンの危険性
The Most Dangerous Jobs In The World
https://www.youtube.com/watch?v=sScmZExKNQQ  1:13 a perilous path
This Plant Feasts on More than 6,000 Insects an Hour
https://www.youtube.com/watch?v=42mNydEeNII  3:16 leaving the mountain and the miners in peril.
Facing Death in the Search for Silver | The New York Times
https://www.youtube.com/watch?v=XiPVmqQQfGw  ビデオのタイトル San Francisco's Famed Coit Tower Murals in Peril Due to Fog, Neglect

練習問題解答
a-3693 a perilous moment
b-2704 some perious times