footwall (English)
├── foot (English)
└── wall (English)
├── wall (Middle English (1100-1500))
│ └── weall (Old English (ca. 450-1100))
├── walle (Middle English (1100-1500))
└── wallen (Middle English (1100-1500))
└── weallian (Old English (ca. 450-1100))
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