He wondered if perhaps he was getting old and losing his grip.

他怀疑自己或许在变老，对事情感到力不从心。

《柯林斯英汉双解大词典》

He started losing his grip on reality, and he went to the Mayo Clinic for electroshock therapy.

他开始失掉对现实的掌控，去梅奥诊所接受电休克治疗。

youdao

I wasn't failing, per se, just losing my grip on the successes I had won.

就其本身而言，我并不是失败，只是在已拥有的成功上失去了掌控权。

youdao

When people feel like they're really losing their grip or their hold, oftentimes violence results.

CNN: Gay people live in 50 Americas

As a result, it is losing its grip on the amount of liquidity in circulation.

ECONOMIST: The Chinese fear inflation; the Japanese long for it

Here are some secrets to get through this winter, without losing your grip.

FORBES: You Forgot How to Drive In Snow, Didn't You? Six Secrets To Keep You Safe