He is known to harry his staff when he is overworked. This man harasses his female co-workers.
source: WordNet 3.0
exhaust by attacking repeatedly
Harass the enemy.
source: WordNet 3.0
To fatigue; to tire with repeated and exhausting efforts; esp., to weary by importunity, teasing, or fretting; to cause to endure excessive burdens or anxieties; -- sometimes followed by out.