euphacia 

A feeling/state of extreme calmness, similar in meaning to euphoria and nivarna.
This feeling isn't something you think, you feel it.

He fell into a state of euphacia when he visited his hometown.

euphacia by SamTheEnlightened August 22, 2018

Euphacic 

The adjective version of Euphacia (extreme calmness)

I was Euphacic when I went for a walk in the forest

Euphacic by SamTheEnlightened August 22, 2018