unguarded

Adjective

Having no guard or protection; vulnerable. / Displaying a lack of caution or thought.

Japanese Meaning

警備や保護がない状態、無防備な状態 / 注意や慎重さに欠ける、油断している

The museum left the priceless artifact unguarded overnight, risking severe damage or theft.

博物館は貴重な遺物を一晩警備されていないまま放置し、深刻な損傷や盗難の危険にさらした。

Sense（1）

Having no guard or protection; vulnerable.

The unguarded gatehouse was soon taken by the invading army.

Sense（2）

Displaying a lack of caution or thought.

I let out her secret in an unguarded moment.

more unguarded

（ comparative ）

most unguarded

（ superlative ）