besieger

Từ điển WordNet v3.1 - WordNet Dictionary

noun

1. an enemy who lays siege to your position (Freq. 2)
• Derivationally related forms:
besiege
• Hypernyms:
enemy, foe, foeman, opposition
2. an energetic petitioner
• Hypernyms:
petitioner, suppliant, supplicant, requester