| 石火 | [せっか, sekka] (n) flint fire; flash [Add to Longdo] |
| 石火矢 | [いしびや, ishibiya] (n) ancient type of cannon [Add to Longdo] |
| 電光石火 | [でんこうせっか, denkousekka] (n, adj-no) lightning speed [Add to Longdo] |
| I ran like lightning. | 電光石火の速さで走った。 |
| He finished it as quick as lightning. | 彼はそれを電光石火の早さで仕上げた。 |