vigilant 英語で:

1. very careful

2. carefully observant or attentive

3. ready for action

4. watching carefully and always ready to notice anything dangerous or illegal

英語 "という言葉vigilant"（watching carefully and always ready to notice anything dangerous or illegal）集合で発生します。

5. watchful

6. giving careful attention to what is happening

英語 "という言葉vigilant"（giving careful attention to what is happening）集合で発生します。