sacred fire; sacred flame
General term for a holy or ceremonial fire, often in religious or traditional contexts.
神殿では聖火が絶やさずに燃やされている。
A sacred fire is kept burning continuously at the temple.
The sacred flame was lit at the opening ceremony.
Olympic flame; Olympic torch
Specifically the flame of the Olympic Games; often used in phrases like 聖火リレー (torch relay).
See also: オリンピック聖火
聖火リレーが市内を通過した。
The Olympic torch relay passed through the city.
選手が聖火を高く掲げて競技場に入った。
The athlete held the torch high and entered the stadium.
The sacred flame went out due to strong wind.
The runners carried the flame from town to town.
聖歌 (a hymn or sacred song) is pronounced identically to 聖火 (a sacred/Olympic flame) but refers to music, not fire.
生花 (fresh-cut or arranged flowers) shares the せいか reading with 聖火 but has nothing to do with fire.
精華 (the essence or quintessence of something) is a homophone of 聖火 but is an abstract noun with no connection to flame.
Olympic cauldron; Olympic flame platform
Olympic torch
Olympic torch relay
torchbearer; flame-bearer
Olympic flame; Olympic torch
Compound of 聖 (holy, sacred) and 火 (fire). The Olympic sense is a modern extension.