This is the 5118th most frequent Turkish word.
hissetmek
To feel.
In this sentence, 'hissetmek' is used to mean perceiving a physical sensation, like vibrations.
Yüksek frekanslı bir ses duyduğunda kulaklarında titreşim hissedebilirsin.
When you hear a high-frequency sound, you can feel vibrations in your ears.
Here, 'hissetmek' is used reflexively to describe the personal feeling of happiness.
Bugün kendimi çok mutlu hissediyorum.
Today, I feel very happy.
Here, 'hissetmek' describes experiencing a specific emotion, in this case, a sense of peace.