speedwell (English)
├── speed (English)
│ ├── spede (Middle English (1100-1500))
│ │ └── sped (Old English (ca. 450-1100))
│ └── speden (Middle English (1100-1500))
│ └── spedan (Old English (ca. 450-1100))
└── well (English)
├── weallan (Old English (ca. 450-1100))
├── wel (Middle English (1100-1500))
└── well (Old English (ca. 450-1100))
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