This is the 2243rd most frequent Russian word.
журналист
Journalist.
Here, the word 'журналист' is used as a profession to denote a person who writes for newspapers or magazines.
Журналист работает в известной газете.
The journalist works for a famous newspaper.
In this case, 'журналистом' is in the instrumental case in Russian, describing the author of the article.
Я читал статью, написанную талантливым журналистом.
I read an article written by a talented journalist.
The word 'журналисты' is used in plural form to refer to a group of journalists.