knubble, nubble /nubˈl/ or knobble /nobˈl/

1. To beat with the fists
2. To knock

• proven
• provenance
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• Provence-rose
• provend
• provender
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• proventriculi
• proventriculus
• Provençal
• Provençale
• prove oneself
• prover
• proverb
• proverbed
• proverbial
• proverbialise
• proverbialised
• proverbialises
• proverbialising