Gerund functioning as a noun meaning the process or act of making something solid.
The rapid solidifying of the molten alloy reduced the formation of cracks.
La solidification rapide de l'alliage fondu a réduit la formation de fissures.
solidifyinggerund / present participle Present-participle adjective modifying nouns (e.g., solidifying crust).
They introduced solidifying measures to stabilize the economy.
Ils ont introduit des mesures solidifiantes pour stabiliser l'économie.