undefended

Từ điển WordNet v3.1 - WordNet Dictionary

adjective

not defended or capable of being defended
- an open city
- open to attack
• Syn:
assailable, undefendable, open
• Similar to:
vulnerable
• Derivationally related forms:
assail (for: assailable), assailability (for: assailable)

• Từ đồng nghĩa / Synonyms:
  assailable, undefendable, open