1. Not defended or capable of being defended
   - undefendable, undefended, open

See also: assail, assailability, vulnerable

• Lucius Licinius Luculus
• Lucius Quinctius Cincinnatus
• Lucius Tarquinius Superbus
• luck
• luck into
• luck it
• luck out
• luck through
• luckily
• luckiness
• luckless
• Lucknow
• lucky
• lucky dip
• Lucky Lindy
• lucrative
• lucratively
• lucrativeness
• lucre
• Lucretia Coffin Mott
• Lucretius
• Lucrezia Borgia
• lucubrate
• lucubration
• luculent