thalweg or talweg /tälˈveg, -vāhh/ (geology)

1. The longitudinal profile of the bottom of a river bed
2. The middle of a main navigable waterway, acting as a boundary between states

• yodles
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• yoga
• Yogalates
• yogas
• yogh
• yoghourt
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• yoghs
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• yo-heave-ho
• yohimbine