restful (English)
├── -ful (English)
└── rest (English)
├── rest (Middle English (1100-1500))
│ └── rest (Old English (ca. 450-1100))
├── reste (Middle English (1100-1500))
│ └── reste (Old French (842-ca. 1400))
└── resten (Middle English (1100-1500))
└── restan (Old English (ca. 450-1100))
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