1. Not prepared or vigilant
   - napping, off-guard, off guard, off his guard, off her guard, off your guard

See also: unready

• traveler's check
• traveler's joy
• perfect participle
• perfect pitch
• perfect tense
• perfecta
• perfected
• perfecter
• perfectibility
• perfectible
• perfection
• perfectionism
• perfectionist
• perfective
• perfective aspect
• perfective tense
• perfectly
• perfectness
• perfervid
• perfidious
• perfidiously
• perfidiousness
• perfidy
• perfluorocarbon
• perfoliate