have one's guard up

Verb

Synonym of keep one's guard up

Japanese Meaning

警戒心を保つ / 常に用心する

After being betrayed before, it's natural to have one's guard up around new acquaintances.

以前に裏切られたことがあると、新しい知り合いに対して警戒心を抱くのは当然だ。

Sense（1）

Synonym of keep one's guard up

has one's guard up

（ present singular third-person ）

having one's guard up

（ participle present ）

had one's guard up

（ participle past ）

had one's guard up

（ past ）