1. Vigilant
   "must remain on your guard in such a situation"
   - on guard, on one's guard, upon one's guard

See also: wary

• lute
• luteal
• luteal phase
• lutecium
• lutefisk
• lutein
• luteinizing hormone
• lutenist
• luteotropin
• luteous
• lutetium
• lutfisk
• Luther
• Luther Burbank
• Lutheran
• Lutheran Church
• Lutheranism
• luthier
• luting
• lutist
• Lutjanidae
• Lutjanus
• Lutjanus analis
• Lutjanus apodus
• Lutjanus blackfordi