Can someone help translate this?

やっはり得体のしれない不安も感じている

''I experienced her nature's unknown anxieties?'' (The context is he's thinking about a woman in the story.)

やっぱり得体のしれない不安も感じている

I guess the first word is "yappari," not "yahhari."

- After all, I feel the inexplicable fear/anxiety."

"etai no shirenai" = inexplicable; lacking a clear reason; you cannot nail down why, but...

Whoops, I left out the part about "mo."
I guess he must be drawn to her, but at the same time he "also" feels anxiety.

As a second opinion...,
but I have no more word after AK's explanation.
(^-^;