淬火 [－－]

Jyutping seoi6 fo2
Pinyin cuì huǒ

Definitions (粵典–words.hk)
  1. 動詞、名詞
    一種​金屬​熱處​理​嘅​工序​。​將金屬​加熱到​某​一​高温​，​再​用水​、​油​或​空氣​令​佢​其​急速​冷​卻​，​以求​令​工件​表面​硬化​。
    quenching, to quench

淬火 [－－]

Jyutping ceoi3 fo2
Pinyin cuì huǒ

Definitions (CC-CEDICT)
  1. to quench
  2. to temper
  3. to harden by quenching
Definitions (粵典–words.hk)
  1. 動詞、名詞
    一種​金屬​熱處​理​嘅​工序​。​將金屬​加熱到​某​一​高温​，​再​用水​、​油​或​空氣​令​佢​其​急速​冷​卻​，​以求​令​工件​表面​硬化​。
    quenching, to quench
Definitions (Wiktionary)
  1. verb
    to quench (in blacksmithing); to temper; to anneal
    (syn.) 蘸火