Examples:
he
treated
his
parents
thoughtlessly
thoughtlessly (English)
├── -ly (English)
│ ├── -lice (Old English (ca. 450-1100))
│ └── -ly (Middle English (1100-1500))
└── thoughtless (English)
├── -less (English)
│ └── -leas (Old English (ca. 450-1100))
│ └── leas (Old English (ca. 450-1100))
└── thought (English)
└── thought (Middle English (1100-1500))
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