1.
defenseless; unguarded; unprotected; vulnerable
Lacking defenses or protective measures. Can describe physical vulnerability, emotional openness, or careless exposure to risk.
Composed of 無 (without) + 防備 (defense/protection). Used both literally (lacking military or physical defenses) and figuratively (emotionally open, naive, carelessly exposed).
Common collocations
- 無防備な姿: unguarded appearance
- 無防備な笑顔: unguarded smile
- 無防備な状態: defenseless state
- 無防備都市: undefended city (international law term)
Usage
In everyday Japanese, often used positively to describe someone who is naturally open and unguarded in a charming way, especially in descriptions of attractive people. In security or military contexts, it has a purely negative connotation.