焼やきなまし

や

き

な

ま

し

Meanings

Technical term in metallurgy and materials science: heating metal or glass and then cooling it slowly to remove internal stresses and increase ductility.

鋼はがねの焼やきなましによって、加か工こうがしやすくなる。
Annealing the steel makes it easier to work with.
ガラスの焼やきなましを怠おこたると、割われやすくなる。
If you neglect to anneal the glass, it becomes prone to cracking.

See all 4 example sentences ›

Kanji

焼bake, burning
鈍dull, slow, foolish

Related words

焼やき入いれ
焼き入れ (quenching) is rapid cooling to harden metal, while 焼きなまし is slow cooling to soften it and relieve stress.
焼やき戻もどし
焼き戻し (tempering) is reheating quenched metal to a moderate temperature to reduce brittleness, often performed after quenching, whereas 焼きなまし is a separate softening process.

Written forms

焼やきなましUsage100%
Standard spelling with okurigana, clear and common in technical contexts.
焼やきなまし
Variant without the okurigana き; seen in some technical writing.
焼やき鈍なまし
Uses the rare kanji 鈍; mostly found in older or specialized metallurgy texts.
焼やき鈍なまし
Combines okurigana with the rare kanji 鈍; very uncommon.

Etymology

Compound of 焼き (yaki, 'baking, heating') + なまし (namashi, 'softening, annealing'), from 焼く (yaku, 'to burn, heat') and 鈍す (namasu, 'to soften metal by heating'). The kanji 鈍 is rare and often replaced by kana.