Third person singular present tense of carburet; to combine with carbon or to treat with carbon to increase hardness.
From carburet, derived from carbon + suffix -et (meaning to treat or combine with). The term emerged in the 19th century as metallurgists developed techniques to harden steel and iron by introducing carbon.
Medieval blacksmiths were essentially carbureting steel without knowing the chemistry—heating iron with charcoal introduced carbon, creating harder steel. Modern carbureting is so precise that it's still used to harden metal parts for engines and tools.
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