умале́ние

rare #49942nounneuterinanimateuncountable

1.
belittling, disparagement, denigration
Э́то умале́ние чужих заслу́г.
This is a belittling of other people's merits.
Bookish.
2.
diminution, reduction, curtailment
Зако́н не допуска́ет умале́ния прав гра́ждан.
The law does not permit any curtailment of citizens' rights.
Bookish; often of rights or significance.

Examples

Умаление чужих достижений выглядит некрасиво.
Belittling other people's achievements looks bad.
Он говорил об умалении роли парламента.
He spoke about the diminishing role of parliament.
Критика привела к умалению его авторитета.
The criticism led to a diminishment of his authority.