bort or boart /bört/

1. Diamond fragments or dust
2. A coarse diamond or crystalline form of carbon, used industrially for cutting or as an abrasive

• undulate
• undulated
• undulately
• undulates
• undulating
• undulatingly
• undulation
• undulationist
• undulationists
• undulations
• undulatory
• undulatus
• undulled
• undulose
• undulous
• unduly
• unduteous
• undutiful
• undutifully
• undutifulness
• undutifulnesses
• undyed
• undying
• undyingly
• undyingness