portcullis /pōrt- or pört-kulˈis/

1. A grating that can be let down to close a gateway of a castle, fortress, etc
2. A lattice (heraldry)
3. One of the pursuivants of the English College of Heralds
4. An Elizabethan silver halfpenny with a portcullis on the reverse

To obstruct, as with a portcullis

• Riojas
• riot
• Riot Act
• riot agent
• riot agents
• rioted
• rioter
• rioters
• riot gear
• riot girl
• riot girls
• riot grrl
• riot grrrl
• rioting
• riotings
• riotise
• riotises
• riotize
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• riotous
• riotously
• riotousness
• riotousnesses
• riot police
• riotries