Capable of catching fire and burning; flammable or combustible.
From Middle English 'burnen' (to burn) derived from Old English 'biernan,' plus the suffix -able meaning 'capable of.' The word has been in English since at least the 14th century.
Not all burnable materials burn the same way—some like wood release heat steadily, while others like hydrogen burn so fast they can explode, which is why rocket scientists obsess over burn rates!
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