There was a feeling of restlessness deep in her soul.

她内心深处感到焦躁不安。

《牛津词典》

Little can compare to the feeling of a deep, complete, heartfelt laughing spell.

没有什么感觉比得上发自内心深处的，彻彻底底的，衷心的笑声。

youdao

Supposedly, when you do a good deed, you get a warm fuzzy feeling inside. But all I felt was a deep, aching sadness.

当你做了件好事，恐怕你会感觉心里暖洋洋的，但我感觉到的是深深的，隐隐作痛的伤感。

youdao

He described it as a voice that overflowed with a deep, tragic feeling.

VOA: special.2009.01.25

His eyes showed a feeling of deep hurt.

VOA: special.2010.05.15

He turned and walked away from his work, a feeling of satisfaction deep within him.

NPR: 'Arson' by Nick Lysohir

However, as uncomfortable a feeling as it was, I knew deep inside that a compact car was the right decision for us.

FORBES: The Pain of the Public Upgrade

We've got a lot of feeling deep down, though we don't always show it.

CNN: Pataki: 'Bush says what he means, he means what he says'