- - "It's always advisable to be ... of the unknown."
- - On alert
- - On the alert
- - On the lookout
- - On one's guard
- - Tired, with no energy, making one cautious
- - hard to take in
- - marked by keen caution and watchful prudence
- - Method is about right but be cautious
- - Needing convincing, say
- - Gun shy?
- - Cagey
- - Guarded
- - See 54-Across
- - Mindful
- - Prudent
- - "... alert!"
- - Apprehensive
- - Skittish
- - Watchful
- - Vigilant
- - Like a sentry
- - Uneasy
- - Suspicious of
- - "Careful!"
- - Suspicious
- - Cautious
- - Cautious and distrustful
- - Skeptical
- [ Edit ]
- [ Other definitions ]