Gerund used as an uncountable noun referring to the act of expressing strong disapproval.
Definitions
The act or practice of expressing strong disapproval or regret. His constant deploring of the new regulations annoyed everyone in the office.
deploregerund / present participle Present-participle form "deploring" can function adjectivally (e.g., "a deploring look").
Definitions
Expressing strong disapproval or regret. There was a deploring tone in his voice when he spoke of the scandal.