besiege

Concise Oxford English Dictionary © 2008 Oxford University Press:
besiege/bɪˈsiːʤ/

▶verb

• 1 surround (a place) with armed forces in order to capture it or force its surrender.

• 2 crowd round oppressively.

  ■ (be besieged) be inundated by large numbers of requests or complaints.

– derivatives
besieger noun.

– origin ME: alt. of assiege, from OFr. asegier.