Gerund functioning as an uncountable noun (the act or process).
The deforming of the beam was visible under the heavy load.
La déformation de la poutre était visible sous la charge lourde.
deforminggerund / present participle More precise classification: adjective derived from a present participle.
The deforming pressure of the heavy machinery left the metal sheet bent and unusable.
La pression déformante des machines lourdes a laissé la tôle pliée et inutilisable.