hobbies的原型是hobby。

n.(业余)爱好

复数hobbies

Between working full-time and taking care of the kids， he didn't have much time for hobbies.

他一边全职工作一边又要照顾孩子，所以抽不出很多时间搞业余爱好。

It is only a hobby， not a life or death struggle.

这只是一项爱好，不需要拼死拼活地努力。