petard /pe-tär or -tärdˈ/

1. A case containing an explosive, used for blowing in doors, etc (Shakespeare petarˈ)
2. A moving firework

hoist with one's own petard see under hoist

• chainless
• chainlet
• chainlets
• chain letter
• chain letters
• chain lightning
• chain-link fence
• chain locker
• chain lockers
• chain mail
• chainman
• chainmen
• chain moulding
• chain of command
• chain of office
• chain pier
• chain piers
• chainplates
• chain printer
• chain printers
• chain pump
• chain pumps
• chain reaction
• chain reactions
• chain reactor