炎
ほのお · honoo · JLPT N3 · noun
fire
🔥 炎 = 火 fire stacked on 火 fire: fire on top of fire is a flame
Honoo comes from old Japanese ho no ho (火の穂), the tip or ear of a fire. Ho is an old reading of 火, so the word literally means fire's tip, which is what a flame is.