quoin /koin/

1. A salient angle, esp of a building
2. A cornerstone, esp a dressed cornerstone
3. A keystone
4. A voussoir (qv)
5. A wedge, esp for locking type in a chase, or for raising a gun

1. To wedge
2. To secure or raise by wedging

• sparging
• spar-hawk
• spar-hawks
• sparid
• sparids
• sparing
• sparingly
• sparingness
• sparingnesses
• spark
• spark chamber
• spark chambers
• spark coil
• spark coils
• sparke
• sparked
• sparked-out
• sparkes
• spark gap
• spark gaps
• sparkie
• sparkier
• sparkiest
• sparking
• sparking-plug