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

See also: unready

• Agrostis palustris
• aground
• agrypnia
• agrypnotic
• agua
• agua toad
• aguacate
• ague
• ague grass
• ague root
• agueweed
• aguish
• ah
• aha
• Ahab
• ahead
• ahead of the game
• ahead of time
• ahem
• Ahern
• ahimsa
• ahistorical
• Ahmad Shah Masoud
• Ahmed Salman Rushdie
• Ahmed Zoki Yamani