Answer: besetting

AnswerCrossword Clue
BESETTINGAttacking
BESETTINGHounding
besettingBESET, to assail (to attack (to assault (to attack)))
besettingBe covered or studded with
besettingHem in; enclose
besettingSurround and harass; assail on all sides
besetting(of a problem or difficulty) Trouble or threaten persistently