焚火
たきび · takibi · JLPT N1 · noun
fire
🔥 焚 = burn, 火 = fire: a burning fire, the open-air bonfire (takibi)
Takibi sounds like 'taki' (rushing, as in waterfall) plus 'bi' (fire, 火 hi). Both kanji are fire-related: 焚 burn and 火 fire.
火 — pictograph of flames rising
火 is a pictograph showing flames rising upward from a fire, with the central stroke as the main blaze and the side strokes as sparks. The ancient oracle bone form looked even more clearly like a burning flame. It still means 'fire' today and serves as a common radical in characters related to heat, burning, or cooking.