裸はだか火び

noun

naked flame; open flame

Refers to an uncovered flame, such as a candle, match, or gas burner, often in safety contexts.

• 実じっ験けん室しつでは裸はだか火びの使し用ようを禁きん止ししています。

  The use of naked flames is prohibited in the laboratory.

• ろうそくの裸はだか火びで部屋へやがほのかに照てらされた。

  The room was faintly lit by the naked flame of a candle.