fire; speculum; to obtain fire by drilling wood, striking flint, sun's rays etc

strokes 16
strokes after radical 13
烽燧 烽燧 feng1 sui4
fire beacon tower (used in frontier regions in former times to relay information about the enemy, using smoke by day and fire at night)

燧人 燧人 sui4 ren2
Suiren, legendary inventor of fire

燧人氏 燧人氏 sui4 ren2 shi4
Suirenshi, legendary inventor of fire

燧石 燧石 sui4 shi2