besetting Definition

beset
verb beset, besetting

now chiefly literary or formal:
1. To worry or harass someone, or to hamper or complicate something (with problems, temptations, obstacles, etc).

Thesaurus: attack, plague, besiege, assail, encircle, surround, pester, harass, badger.
2. To surround, attack or beseige (a person or people) on every side.

Etymology: Anglo-Saxon besettan to surround or set about.