yen

: to have an intense desire : long

"I have yenned for her since the day I left town."

sedentary

1 : not migratory : settled
2 a : doing or requiring much sitting b : not physically active
3 : permanently attached

"Perhaps if I was less sedentary physically I would be more so mentally."

Acherontic

1: Of or pertaining to Acheron; infernal; gloomy; moribund; dark and dismal as of the rivers Acheron and Styx in Hades.

"in the depths of an Acheronian forest/upon those roseate lips a Stygian hue" -Wordsworth

"An Acherontic cloud seemed to be descending upon me."

surprise

1 a : an attack made without warning b : a taking unawares
2 : something that surprises
3 : the state of being surprised

"Though I had an inkling, I was nonetheless surprised when she explained that she had been seeing someone else for the past month."