Examples: The wax hardened
Examples: The cold hardened the butter
Examples: temper steel
Examples: This trip will season even the hardiest traveller
Examples: He was inured to the cold
harden (English)├── -en (English)│ ├── -en (Middle English (1100-1500))│ └── -enen (Middle English (1100-1500))└── hard (English) └── heard (Old English (ca. 450-1100))
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