Meaning of -MENT in English

-MENT

-ment is added to some verbs to form nouns that refer to actions, processes, or states.

...shortly after the commencement of the service.

...the enrichment of uranium.

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Collins COBUILD Advanced Learner's English Dictionary.      Английский словарь Коллинз COBUILD для изучающих язык на продвинутом уровне.