Constantly Worry or Think About Something

This page is the CodyCross answer for the clue below from Germany, Group 2186, Puzzle 3 (Braunschweig).

Question is: Constantly Worry or Think About Something

and the answer is: OBSESS

Word Meaning:

OBSESS — (passive voice, constructed with "with") To be preoccupied with a single topic or emotion.

Definitions from Wiktionary.