stepson (English)
├── son (English)
│ └── sone (Middle English (1100-1500))
│ ├── sunu (Middle English (1100-1500))
│ └── sunu (Old English (ca. 450-1100))
└── step- (English)
└── step- (Middle English (1100-1500))
└── steop- (Old English (ca. 450-1100))
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