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

See also: unready

• Fridtjof Nansen
• fried
• fried egg
• fried rice
• Friedan
• friedcake
• Friedman
• Friedman test
• Friedreich's ataxia
• Friedrich Anton Mesmer
• Friedrich August Kekule
• Friedrich August Kekule von Stradonitz
• Friedrich August von Hayek
• Friedrich August Wolf
• Friedrich Engels
• Friedrich Froebel
• Friedrich Gottlieb Klopstock
• Friedrich Hebbel
• Friedrich Krupp
• Friedrich Max Muller
• Holcus lanatus
• Holcus mollis
• hold
• hold back
• hold close