dare

dare デｱｰ　v)思い切って...する

何かをしなかった

not dare + 原形　（勇気がなかった）

not want to risk + 動名詞　（危険を冒したくなかった）

didn't dare＋動詞原形＝didn't want to risk ...ing

I didn't dare tell her that we'd already found the keys.

(I didn't dare that we'd already found the keys)

I didn't want to risk breaking the desk drawer.

I didn't want to run the risk of breaking the PC.

I used to smoke, but I would never dare.

No one dared to leave the office before the boss did.

No one dared to go into the old house at night.

Many Nova students and teachers don't want to run the risk of being infected COVID-19.

No one want to run the risk of being infected COVID-19.