一閃[issen] flash 閃かす[hiramekasu] to brandish 閃き[hirameki] flair 閃く[hirameku] to flash (lightning, etc.) 閃光[senkou] flash
閃光電球[senkoudenkyuu] flash bulb 花崗閃緑岩[kakousenryokugan] granodiorite 紫電一閃[shidenissen] flash of lightning 電光一閃[denkouissen] flash of lightning 閃緑岩[senryokugan] diorite (a type of rock similar to granite)