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時
じ
効
こう
硬
こう
化
か
Meanings
Noun
Chemistry
1. age hardening; precipitation hardening; particle hardening
Kanji used
時
time
効
be effective
硬
hard like a rock
化
transformation
Pitch accent
⚠
じ
こうこ
うか
Composed of
時
じ
効
こう
prescription; statute of limitations; lapsing with time (e.g. of an obligation); no longer standing (e.g. of a promise); ageing; aging
硬
こう
化
か
hardening; vulcanization; hardening (of attitude, stance, etc.); stiffening; upturn (in the market); firming up