1. Not prepared or vigilant
   - napping, off-guard, off guard, off one's guard, off his guard, off your guard

See also: unready

• aliform
• alight
• align
• aligned
• aligning
• alignment
• alike
• alikeness
• aliment
• alimental
• alimentary
• alimentary canal
• alimentary paste
• alimentary tract
• alimentary tract smear
• alimentation
• alimentative
• alimony
• aline
• alinement
• aliphatic
• aliphatic compound
• aliquant
• aliquant part
• aliquot